/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-newlib/float_req_bl_1072d.c
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This is Ultimate 0.1.25-d623d84
[2020-07-20 10:45:20,281 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 10:45:20,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 10:45:20,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 10:45:20,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 10:45:20,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 10:45:20,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 10:45:20,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 10:45:20,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 10:45:20,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 10:45:20,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 10:45:20,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 10:45:20,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 10:45:20,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 10:45:20,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 10:45:20,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 10:45:20,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 10:45:20,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 10:45:20,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 10:45:20,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 10:45:20,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 10:45:20,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 10:45:20,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 10:45:20,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 10:45:20,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 10:45:20,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 10:45:20,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 10:45:20,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
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[2020-07-20 10:45:20,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 10:45:20,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 10:45:20,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 10:45:20,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
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[2020-07-20 10:45:20,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 10:45:20,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 10:45:20,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 10:45:20,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 10:45:20,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 10:45:20,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 10:45:20,333 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 10:45:20,348 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 10:45:20,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 10:45:20,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 10:45:20,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 10:45:20,350 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 10:45:20,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 10:45:20,351 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 10:45:20,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 10:45:20,351 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 10:45:20,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 10:45:20,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 10:45:20,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 10:45:20,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 10:45:20,352 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 10:45:20,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 10:45:20,352 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 10:45:20,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 10:45:20,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 10:45:20,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 10:45:20,353 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 10:45:20,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 10:45:20,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 10:45:20,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 10:45:20,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 10:45:20,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 10:45:20,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 10:45:20,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:45:20,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 10:45:20,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 10:45:20,355 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 10:45:20,646 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 10:45:20,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 10:45:20,662 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 10:45:20,663 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 10:45:20,664 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 10:45:20,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c
[2020-07-20 10:45:20,738 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/332a43a89/ae8b900dc9b047979404dd63c75605e1/FLAGe2b3f1308
[2020-07-20 10:45:21,233 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 10:45:21,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1072d.c
[2020-07-20 10:45:21,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/332a43a89/ae8b900dc9b047979404dd63c75605e1/FLAGe2b3f1308
[2020-07-20 10:45:21,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/332a43a89/ae8b900dc9b047979404dd63c75605e1
[2020-07-20 10:45:21,583 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 10:45:21,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 10:45:21,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 10:45:21,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 10:45:21,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 10:45:21,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28942c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21, skipping insertion in model container
[2020-07-20 10:45:21,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 10:45:21,623 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 10:45:21,807 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 10:45:21,811 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 10:45:21,844 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 10:45:21,873 INFO L208 MainTranslator]: Completed translation
[2020-07-20 10:45:21,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21 WrapperNode
[2020-07-20 10:45:21,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 10:45:21,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 10:45:21,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 10:45:21,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 10:45:21,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:21,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (1/1) ...
[2020-07-20 10:45:22,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 10:45:22,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 10:45:22,003 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 10:45:22,003 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 10:45:22,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (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 10:45:22,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 10:45:22,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 10:45:22,068 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float
[2020-07-20 10:45:22,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float
[2020-07-20 10:45:22,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 10:45:22,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 10:45:22,069 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float
[2020-07-20 10:45:22,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 10:45:22,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~real
[2020-07-20 10:45:22,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 10:45:22,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 10:45:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 10:45:22,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~real
[2020-07-20 10:45:22,072 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float
[2020-07-20 10:45:22,072 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 10:45:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 10:45:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 10:45:22,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 10:45:22,435 INFO L295 CfgBuilder]: Removed 8 assume(true) statements.
[2020-07-20 10:45:22,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:22 BoogieIcfgContainer
[2020-07-20 10:45:22,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 10:45:22,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 10:45:22,439 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 10:45:22,443 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 10:45:22,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:21" (1/3) ...
[2020-07-20 10:45:22,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a43f9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:22, skipping insertion in model container
[2020-07-20 10:45:22,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:21" (2/3) ...
[2020-07-20 10:45:22,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a43f9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:22, skipping insertion in model container
[2020-07-20 10:45:22,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:22" (3/3) ...
[2020-07-20 10:45:22,446 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072d.c
[2020-07-20 10:45:22,456 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 10:45:22,463 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 10:45:22,476 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 10:45:22,499 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 10:45:22,499 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 10:45:22,499 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 10:45:22,500 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 10:45:22,500 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 10:45:22,500 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 10:45:22,500 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 10:45:22,500 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 10:45:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states.
[2020-07-20 10:45:22,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 10:45:22,524 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 10:45:22,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:45:22,526 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:45:22,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:45:22,532 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times
[2020-07-20 10:45:22,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:45:22,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680994124]
[2020-07-20 10:45:22,541 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 10:45:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:45:22,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 10:45:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:45:22,661 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 10:45:22,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:45:22,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680994124]
[2020-07-20 10:45:22,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:45:22,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 10:45:22,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218254326]
[2020-07-20 10:45:22,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 10:45:22,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:45:22,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 10:45:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 10:45:22,683 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states.
[2020-07-20 10:45:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:45:22,708 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions.
[2020-07-20 10:45:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-07-20 10:45:22,709 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18
[2020-07-20 10:45:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:45:22,719 INFO L225 Difference]: With dead ends: 68
[2020-07-20 10:45:22,720 INFO L226 Difference]: Without dead ends: 34
[2020-07-20 10:45:22,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 10:45:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-07-20 10:45:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34.
[2020-07-20 10:45:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-07-20 10:45:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions.
[2020-07-20 10:45:22,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18
[2020-07-20 10:45:22,767 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:45:22,768 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions.
[2020-07-20 10:45:22,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 10:45:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions.
[2020-07-20 10:45:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-20 10:45:22,769 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 10:45:22,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:45:22,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:45:22,984 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:45:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:45:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times
[2020-07-20 10:45:22,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:45:22,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847928484]
[2020-07-20 10:45:22,987 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 10:45:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 10:45:23,043 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 10:45:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 10:45:23,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 10:45:23,085 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 10:45:23,085 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 10:45:23,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:45:23,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:45:23 BoogieIcfgContainer
[2020-07-20 10:45:23,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 10:45:23,335 INFO L168 Benchmark]: Toolchain (without parser) took 1750.29 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 100.8 MB in the beginning and 118.6 MB in the end (delta: -17.8 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB.
[2020-07-20 10:45:23,336 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 135.8 MB. Free memory is still 118.5 MB. There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-20 10:45:23,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.49 ms. Allocated memory is still 135.8 MB. Free memory was 100.8 MB in the beginning and 89.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB.
[2020-07-20 10:45:23,338 INFO L168 Benchmark]: Boogie Preprocessor took 127.59 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 89.8 MB in the beginning and 177.1 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
[2020-07-20 10:45:23,339 INFO L168 Benchmark]: RCFGBuilder took 435.70 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 156.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB.
[2020-07-20 10:45:23,340 INFO L168 Benchmark]: TraceAbstraction took 893.54 ms. Allocated memory is still 199.8 MB. Free memory was 156.4 MB in the beginning and 118.6 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB.
[2020-07-20 10:45:23,344 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.19 ms. Allocated memory is still 135.8 MB. Free memory is still 118.5 MB. There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 287.49 ms. Allocated memory is still 135.8 MB. Free memory was 100.8 MB in the beginning and 89.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 127.59 ms. Allocated memory was 135.8 MB in the beginning and 199.8 MB in the end (delta: 64.0 MB). Free memory was 89.8 MB in the beginning and 177.1 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 435.70 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 156.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 893.54 ms. Allocated memory is still 199.8 MB. Free memory was 156.4 MB in the beginning and 118.6 MB in the end (delta: 37.8 MB). Peak memory consumption was 37.8 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable
Unable to prove that call of __VERIFIER_error() unreachable
Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 19, overapproximation of someUnaryFLOAToperation at line 62, overapproximation of someBinaryArithmeticFLOAToperation at line 38.
Possible FailurePath:
[L62] float x = -0.0f;
[L63] CALL, EXPR trunc_float(x)
VAL [\old(x)=0]
[L13] __int32_t signbit, w, exponent_less_127;
VAL [\old(x)=0, x=0]
[L15] ieee_float_shape_type gf_u;
[L16] gf_u.value = (x)
[L17] EXPR gf_u.word
[L17] (w) = gf_u.word
[L19] signbit = w & 0x80000000
[L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127
VAL [\old(x)=0, exponent_less_127=255, signbit=4294967295, w=0, x=0]
[L21] COND FALSE !(exponent_less_127 < 23)
VAL [\old(x)=0, exponent_less_127=255, signbit=4294967295, w=0, x=0]
[L37] COND TRUE exponent_less_127 == 255
[L38] return x + x;
VAL [\old(x)=0, exponent_less_127=255, signbit=4294967295, w=0, x=0]
[L63] RET, EXPR trunc_float(x)
VAL [trunc_float(x)=2, x=0]
[L63] float res = trunc_float(x);
[L66] EXPR res == -0.0f && __signbit_float(res) == 1
VAL [res=2, res == -0.0f && __signbit_float(res) == 1=0, x=0]
[L66] COND TRUE !(res == -0.0f && __signbit_float(res) == 1)
[L67] __VERIFIER_error()
VAL [res=2, x=0]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 38 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: 41 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 289 SizeOfPredicates, 0 NumberOfNonLiveVariables, 59 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...