/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1010.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:15:06,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:15:06,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:15:06,732 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:15:06,732 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:15:06,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:15:06,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:15:06,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:15:06,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:15:06,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:15:06,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:15:06,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:15:06,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:15:06,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:15:06,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:15:06,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:15:06,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:15:06,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:15:06,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:15:06,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:15:06,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:15:06,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:15:06,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:15:06,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:15:06,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 19:15:06,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 19:15:06,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 19:15:06,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 19:15:06,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 19:15:06,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 19:15:06,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 19:15:06,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 19:15:06,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 19:15:06,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 19:15:06,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 19:15:06,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 19:15:06,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 19:15:06,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 19:15:06,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:15:06,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:15:06,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:15:06,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:15:06,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:15:06,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:15:06,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:15:06,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:15:06,838 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:15:06,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:15:06,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:15:06,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:15:06,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:15:06,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:15:06,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:15:06,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:15:06,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:15:06,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:15:06,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:15:06,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:15:06,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:15:06,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:15:06,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:15:06,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:15:06,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:15:06,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:15:06,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:15:06,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:15:06,847 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:15:06,847 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:15:06,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:06,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:15:06,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:15:06,848 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 -> DAGSIZE 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 -> 2 [2020-07-21 19:15:07,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:15:07,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:15:07,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:15:07,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:15:07,175 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:15:07,175 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2020-07-21 19:15:07,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8778bfd3/1f74644f5cb54f8b86f743d16fee53cd/FLAG650f06dea [2020-07-21 19:15:07,731 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:15:07,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2020-07-21 19:15:07,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8778bfd3/1f74644f5cb54f8b86f743d16fee53cd/FLAG650f06dea [2020-07-21 19:15:08,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8778bfd3/1f74644f5cb54f8b86f743d16fee53cd [2020-07-21 19:15:08,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:15:08,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:15:08,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:08,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:15:08,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:15:08,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f02511f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08, skipping insertion in model container [2020-07-21 19:15:08,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:15:08,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:15:08,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:08,365 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:15:08,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:15:08,410 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:15:08,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08 WrapperNode [2020-07-21 19:15:08,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:15:08,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:15:08,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:15:08,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:15:08,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... [2020-07-21 19:15:08,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:15:08,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:15:08,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:15:08,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:15:08,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:15:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:15:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:15:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-07-21 19:15:08,591 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-07-21 19:15:08,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:15:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:15:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-21 19:15:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-07-21 19:15:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-07-21 19:15:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 19:15:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-21 19:15:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 19:15:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 19:15:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 19:15:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-21 19:15:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:15:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:15:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:15:08,853 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:15:08,854 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 19:15:08,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:08 BoogieIcfgContainer [2020-07-21 19:15:08,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:15:08,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:15:08,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:15:08,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:15:08,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:15:08" (1/3) ... [2020-07-21 19:15:08,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111e175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:08, skipping insertion in model container [2020-07-21 19:15:08,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:15:08" (2/3) ... [2020-07-21 19:15:08,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111e175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:15:08, skipping insertion in model container [2020-07-21 19:15:08,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:15:08" (3/3) ... [2020-07-21 19:15:08,867 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1010.c [2020-07-21 19:15:08,878 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:15:08,886 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:15:08,903 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:15:08,932 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:15:08,932 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:15:08,933 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:15:08,933 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:15:08,933 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:15:08,933 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:15:08,933 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:15:08,934 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:15:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 19:15:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 19:15:08,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:08,964 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] [2020-07-21 19:15:08,964 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:08,971 INFO L82 PathProgramCache]: Analyzing trace with hash -156268844, now seen corresponding path program 1 times [2020-07-21 19:15:08,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:08,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329729923] [2020-07-21 19:15:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:09,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:09,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:15:09,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 19:15:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:15:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:15:09,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:15:09,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329729923] [2020-07-21 19:15:09,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:15:09,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 19:15:09,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315791991] [2020-07-21 19:15:09,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 19:15:09,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:15:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 19:15:09,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 19:15:09,127 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-21 19:15:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:15:09,148 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 19:15:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 19:15:09,149 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 19:15:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:15:09,159 INFO L225 Difference]: With dead ends: 48 [2020-07-21 19:15:09,159 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 19:15:09,162 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 [2020-07-21 19:15:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 19:15:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-21 19:15:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 19:15:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-07-21 19:15:09,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 21 [2020-07-21 19:15:09,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:15:09,205 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-07-21 19:15:09,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 19:15:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-07-21 19:15:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 19:15:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:15:09,207 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, 1] [2020-07-21 19:15:09,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:09,421 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:15:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:15:09,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1988246281, now seen corresponding path program 1 times [2020-07-21 19:15:09,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:15:09,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917674337] [2020-07-21 19:15:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:09,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:15:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 19:15:09,503 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:15:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 19:15:09,526 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 19:15:09,551 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 19:15:09,551 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 19:15:09,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:15:09,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:15:09 BoogieIcfgContainer [2020-07-21 19:15:09,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:15:09,800 INFO L168 Benchmark]: Toolchain (without parser) took 1682.64 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 105.1 MB in the beginning and 127.1 MB in the end (delta: -22.1 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:09,801 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 19:15:09,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.74 ms. Allocated memory is still 140.0 MB. Free memory was 104.6 MB in the beginning and 94.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:09,803 INFO L168 Benchmark]: Boogie Preprocessor took 121.55 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 94.3 MB in the beginning and 181.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:09,804 INFO L168 Benchmark]: RCFGBuilder took 326.17 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 166.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:09,805 INFO L168 Benchmark]: TraceAbstraction took 936.30 ms. Allocated memory is still 204.5 MB. Free memory was 165.7 MB in the beginning and 127.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-07-21 19:15:09,809 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 140.0 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.74 ms. Allocated memory is still 140.0 MB. Free memory was 104.6 MB in the beginning and 94.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.55 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 94.3 MB in the beginning and 181.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 326.17 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 166.4 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 936.30 ms. Allocated memory is still 204.5 MB. Free memory was 165.7 MB in the beginning and 127.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 40]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 12, overapproximation of someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L35] float x = 0.0f / 0.0f; [L36] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L15] __uint32_t ix; VAL [\old(x)=0, x=0] [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (ix) = gf_u.word [L22] ieee_float_shape_type sf_u; [L23] sf_u.word = (ix & 0x7fffffff) [L24] EXPR sf_u.value [L24] (x) = sf_u.value [L26] return x; VAL [\old(x)=0, \result=2, ix=8, x=2] [L36] RET, EXPR fabs_float(x) VAL [fabs_float(x)=2, x=0] [L36] float res = fabs_float(x); [L39] CALL, EXPR isnan_float(res) VAL [\old(x)=2] [L12] return x != x; VAL [\old(x)=2, \result=0, x=2] [L39] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=2, x=0] [L39] COND TRUE !isnan_float(res) [L40] __VERIFIER_error() VAL [res=2, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 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: 27 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=28occurred 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, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 400 SizeOfPredicates, 0 NumberOfNonLiveVariables, 68 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...