/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 13:06:00,472 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 13:06:00,475 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 13:06:00,494 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 13:06:00,494 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 13:06:00,496 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 13:06:00,499 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 13:06:00,509 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 13:06:00,514 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 13:06:00,518 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 13:06:00,520 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 13:06:00,521 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 13:06:00,521 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 13:06:00,523 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 13:06:00,526 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 13:06:00,527 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 13:06:00,528 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 13:06:00,530 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 13:06:00,532 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 13:06:00,538 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 13:06:00,544 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 13:06:00,547 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 13:06:00,549 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 13:06:00,549 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 13:06:00,552 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 13:06:00,552 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 13:06:00,553 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 13:06:00,555 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 13:06:00,555 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 13:06:00,557 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 13:06:00,557 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 13:06:00,558 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 13:06:00,559 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 13:06:00,560 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 13:06:00,561 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 13:06:00,562 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 13:06:00,562 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 13:06:00,563 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 13:06:00,563 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 13:06:00,564 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 13:06:00,565 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 13:06:00,566 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 13:06:00,602 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 13:06:00,602 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 13:06:00,604 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 13:06:00,604 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 13:06:00,604 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 13:06:00,604 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 13:06:00,605 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 13:06:00,605 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 13:06:00,605 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 13:06:00,605 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 13:06:00,605 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 13:06:00,606 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 13:06:00,606 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 13:06:00,606 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 13:06:00,606 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 13:06:00,606 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 13:06:00,607 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 13:06:00,607 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 13:06:00,607 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 13:06:00,607 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 13:06:00,607 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 13:06:00,608 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:06:00,608 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 13:06:00,608 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 13:06:00,608 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 13:06:00,609 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 13:06:00,609 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:00,609 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 13:06:00,609 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 13:06:00,609 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 13:06:00,894 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 13:06:00,907 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 13:06:00,910 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 13:06:00,912 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 13:06:00,912 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 13:06:00,913 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c
[2020-07-20 13:06:00,994 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3c2848f/9998f8fb506d4650ac1daf9cafdfac2d/FLAG171d5fab2
[2020-07-20 13:06:01,449 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 13:06:01,449 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c
[2020-07-20 13:06:01,460 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3c2848f/9998f8fb506d4650ac1daf9cafdfac2d/FLAG171d5fab2
[2020-07-20 13:06:01,767 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3c2848f/9998f8fb506d4650ac1daf9cafdfac2d
[2020-07-20 13:06:01,777 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 13:06:01,780 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 13:06:01,781 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 13:06:01,782 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 13:06:01,785 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 13:06:01,787 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:01" (1/1) ...
[2020-07-20 13:06:01,790 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c96b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:01, skipping insertion in model container
[2020-07-20 13:06:01,790 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:01" (1/1) ...
[2020-07-20 13:06:01,798 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 13:06:01,818 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 13:06:01,995 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:06:01,998 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 13:06:02,030 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:06:02,143 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 13:06:02,144 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02 WrapperNode
[2020-07-20 13:06:02,144 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 13:06:02,145 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 13:06:02,145 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 13:06:02,145 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 13:06:02,156 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
[2020-07-20 13:06:02,156 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
[2020-07-20 13:06:02,166 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
[2020-07-20 13:06:02,166 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
[2020-07-20 13:06:02,177 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
[2020-07-20 13:06:02,184 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
[2020-07-20 13:06:02,186 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
[2020-07-20 13:06:02,189 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 13:06:02,189 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 13:06:02,190 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 13:06:02,190 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 13:06:02,191 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:06:02,249 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 13:06:02,249 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 13:06:02,250 INFO  L138     BoogieDeclarations]: Found implementation of procedure isnan_float
[2020-07-20 13:06:02,250 INFO  L138     BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf
[2020-07-20 13:06:02,250 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 13:06:02,250 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 13:06:02,250 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float
[2020-07-20 13:06:02,250 INFO  L130     BoogieDeclarations]: Found specification of procedure isnan_float
[2020-07-20 13:06:02,251 INFO  L130     BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf
[2020-07-20 13:06:02,251 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 13:06:02,251 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-07-20 13:06:02,251 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 13:06:02,251 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 13:06:02,251 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 13:06:02,251 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2020-07-20 13:06:02,252 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 13:06:02,252 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 13:06:02,252 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 13:06:02,651 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 13:06:02,652 INFO  L295             CfgBuilder]: Removed 6 assume(true) statements.
[2020-07-20 13:06:02,656 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:02 BoogieIcfgContainer
[2020-07-20 13:06:02,657 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 13:06:02,658 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 13:06:02,658 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 13:06:02,661 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 13:06:02,662 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:01" (1/3) ...
[2020-07-20 13:06:02,662 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e089c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:02, skipping insertion in model container
[2020-07-20 13:06:02,663 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:02" (2/3) ...
[2020-07-20 13:06:02,663 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e089c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:02, skipping insertion in model container
[2020-07-20 13:06:02,663 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:02" (3/3) ...
[2020-07-20 13:06:02,665 INFO  L109   eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c
[2020-07-20 13:06:02,674 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 13:06:02,679 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 13:06:02,692 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 13:06:02,714 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 13:06:02,714 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 13:06:02,714 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 13:06:02,715 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 13:06:02,715 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 13:06:02,715 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 13:06:02,715 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 13:06:02,715 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 13:06:02,737 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states.
[2020-07-20 13:06:02,743 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 13:06:02,744 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:06:02,745 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]
[2020-07-20 13:06:02,745 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:06:02,751 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:06:02,751 INFO  L82        PathProgramCache]: Analyzing trace with hash 159633202, now seen corresponding path program 1 times
[2020-07-20 13:06:02,758 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:06:02,758 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765835543]
[2020-07-20 13:06:02,759 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:02,856 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 13:06:02,857 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:06:02,859 INFO  L263         TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 13:06:02,865 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:06:02,890 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:06:02,891 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:06:02,892 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765835543]
[2020-07-20 13:06:02,893 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:06:02,893 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 13:06:02,894 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985479194]
[2020-07-20 13:06:02,899 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 13:06:02,899 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:06:02,913 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 13:06:02,914 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 13:06:02,916 INFO  L87              Difference]: Start difference. First operand 46 states. Second operand 2 states.
[2020-07-20 13:06:02,940 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:06:02,941 INFO  L93              Difference]: Finished difference Result 84 states and 118 transitions.
[2020-07-20 13:06:02,942 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 13:06:02,943 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 21
[2020-07-20 13:06:02,944 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:06:02,956 INFO  L225             Difference]: With dead ends: 84
[2020-07-20 13:06:02,956 INFO  L226             Difference]: Without dead ends: 42
[2020-07-20 13:06:02,959 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 13:06:02,975 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-07-20 13:06:02,996 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42.
[2020-07-20 13:06:02,998 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-07-20 13:06:03,000 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions.
[2020-07-20 13:06:03,001 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 21
[2020-07-20 13:06:03,002 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:06:03,002 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 52 transitions.
[2020-07-20 13:06:03,002 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 13:06:03,003 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions.
[2020-07-20 13:06:03,004 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 13:06:03,004 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:06:03,004 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:06:03,218 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:03,218 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:06:03,219 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:06:03,220 INFO  L82        PathProgramCache]: Analyzing trace with hash 1643831456, now seen corresponding path program 1 times
[2020-07-20 13:06:03,220 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:06:03,221 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269355307]
[2020-07-20 13:06:03,222 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:03,298 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:06:03,299 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 13:06:03,299 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:06:03,319 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 13:06:03,319 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:06:03,345 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 13:06:03,345 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 13:06:03,559 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:06:03,591 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:06:03 BoogieIcfgContainer
[2020-07-20 13:06:03,592 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 13:06:03,595 INFO  L168              Benchmark]: Toolchain (without parser) took 1814.66 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 104.1 MB in the beginning and 116.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 45.0 MB. Max. memory is 7.1 GB.
[2020-07-20 13:06:03,596 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 13:06:03,597 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 362.79 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.7 MB in the beginning and 182.0 MB in the end (delta: -78.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB.
[2020-07-20 13:06:03,598 INFO  L168              Benchmark]: Boogie Preprocessor took 44.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB.
[2020-07-20 13:06:03,598 INFO  L168              Benchmark]: RCFGBuilder took 467.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 158.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB.
[2020-07-20 13:06:03,599 INFO  L168              Benchmark]: TraceAbstraction took 933.77 ms. Allocated memory is still 203.9 MB. Free memory was 158.0 MB in the beginning and 116.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB.
[2020-07-20 13:06:03,603 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 362.79 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 103.7 MB in the beginning and 182.0 MB in the end (delta: -78.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 44.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 180.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 467.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 158.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 933.77 ms. Allocated memory is still 203.9 MB. Free memory was 158.0 MB in the beginning and 116.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 96]: Unable to prove that call of __VERIFIER_error() unreachable
    Unable to prove that call of __VERIFIER_error() unreachable
 Reason: overapproximation of someBinaryFLOATComparisonOperation at line 13, overapproximation of someBinaryArithmeticFLOAToperation at line 30, overapproximation of bitwiseAnd at line 27. 
Possible FailurePath: 
[L15]              static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30;
       VAL         [\old(one_sqrt)=0, \old(tiny_sqrt)=2, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000]
[L91]              float x = 0.0f / 0.0f;
       VAL         [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000]
[L92]  CALL, EXPR  __ieee754_sqrtf(x)
       VAL         [\old(x)=6, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000]
[L18]              float z;
[L19]              __uint32_t r, hx;
[L20]              __int32_t ix, s, q, m, t, i;
       VAL         [\old(x)=6, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6]
[L23]              ieee_float_shape_type gf_u;
[L24]              gf_u.value = (x)
[L25]  EXPR        gf_u.word
[L25]              (ix) = gf_u.word
[L27]              hx = ix & 0x7fffffff
       VAL         [\old(x)=6, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6]
[L29]  COND TRUE   !((hx) < 0x7f800000L)
[L30]              return x * x + x;
       VAL         [\old(x)=6, hx=-2155872256, ix=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6]
[L92]  RET, EXPR   __ieee754_sqrtf(x)
       VAL         [__ieee754_sqrtf(x)=7, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=6]
[L92]              float res = __ieee754_sqrtf(x);
[L95]  CALL, EXPR  isnan_float(res)
       VAL         [\old(x)=7, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000]
[L13]              return x != x;
       VAL         [\old(x)=7, \result=0, one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000, x=7]
[L95]  RET, EXPR   isnan_float(res)
       VAL         [isnan_float(res)=0, one_sqrt=1, res=7, tiny_sqrt=1/1000000000000000000000000000000, x=6]
[L95]  COND TRUE   !isnan_float(res)
[L96]              __VERIFIER_error()
       VAL         [one_sqrt=1, res=7, tiny_sqrt=1/1000000000000000000000000000000, x=6]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 46 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: 56 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred 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, 43 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 63 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...