/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:19:39,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:19:39,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:19:39,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:19:39,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:19:39,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:19:39,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:19:39,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:19:39,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:19:39,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:19:39,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:19:39,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:19:39,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:19:39,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:19:39,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:19:39,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:19:39,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:19:39,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:19:39,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:19:39,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:19:39,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:19:39,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:19:39,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:19:39,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:19:39,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:19:39,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:19:39,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:19:39,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:19:39,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:19:39,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 21:19:39,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:19:39,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:19:39,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:19:39,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:19:39,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:19:39,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:19:39,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:19:39,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:19:39,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:19:39,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:19:39,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:19:39,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:19:39,951 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:19:39,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:19:39,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:19:39,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:19:39,955 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:19:39,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:19:39,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:19:39,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:19:39,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:19:39,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:19:39,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:19:39,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:19:39,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:19:39,958 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:19:39,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:19:39,958 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:19:39,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:19:39,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:19:39,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:19:39,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:19:39,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:19:39,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:19:39,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:19:39,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:19:39,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:19:39,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:19:39,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:19:39,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:19:39,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:19:39,961 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:19:40,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:19:40,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:19:40,313 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:19:40,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:19:40,315 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:19:40,315 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-21 21:19:40,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a684b1823/85719b9229df475fae4e7b07d79f6df6/FLAGd5383f58b [2020-08-21 21:19:40,893 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:19:40,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-21 21:19:40,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a684b1823/85719b9229df475fae4e7b07d79f6df6/FLAGd5383f58b [2020-08-21 21:19:41,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a684b1823/85719b9229df475fae4e7b07d79f6df6 [2020-08-21 21:19:41,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:19:41,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:19:41,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:19:41,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:19:41,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:19:41,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb7919e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41, skipping insertion in model container [2020-08-21 21:19:41,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:19:41,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:19:41,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:19:41,664 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:19:41,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:19:41,727 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:19:41,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41 WrapperNode [2020-08-21 21:19:41,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:19:41,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:19:41,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:19:41,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:19:41,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... [2020-08-21 21:19:41,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:19:41,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:19:41,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:19:41,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:19:41,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 21:19:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:19:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:19:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-21 21:19:41,852 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-21 21:19:41,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:19:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:19:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-21 21:19:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-21 21:19:41,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 21:19:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 21:19:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 21:19:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 21:19:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 21:19:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 21:19:41,854 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-21 21:19:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:19:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:19:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-21 21:19:41,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:19:42,366 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:19:42,366 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-21 21:19:42,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:19:42 BoogieIcfgContainer [2020-08-21 21:19:42,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:19:42,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:19:42,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:19:42,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:19:42,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:19:41" (1/3) ... [2020-08-21 21:19:42,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:19:42, skipping insertion in model container [2020-08-21 21:19:42,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:41" (2/3) ... [2020-08-21 21:19:42,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:19:42, skipping insertion in model container [2020-08-21 21:19:42,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:19:42" (3/3) ... [2020-08-21 21:19:42,379 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-21 21:19:42,390 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:19:42,399 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:19:42,414 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:19:42,440 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:19:42,440 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:19:42,441 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:19:42,441 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:19:42,441 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:19:42,441 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:19:42,442 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:19:42,442 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:19:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 21:19:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 21:19:42,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:42,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:42,471 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-21 21:19:42,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:42,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548890355] [2020-08-21 21:19:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:42,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:19:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:42,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 21:19:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:19:42,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548890355] [2020-08-21 21:19:42,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:19:42,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:19:42,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939779167] [2020-08-21 21:19:42,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 21:19:42,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:19:42,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 21:19:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 21:19:42,767 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 21:19:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:19:43,076 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-21 21:19:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:19:43,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-21 21:19:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:19:43,091 INFO L225 Difference]: With dead ends: 116 [2020-08-21 21:19:43,091 INFO L226 Difference]: Without dead ends: 56 [2020-08-21 21:19:43,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:19:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-21 21:19:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-21 21:19:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 21:19:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-21 21:19:43,149 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-21 21:19:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:19:43,150 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-21 21:19:43,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 21:19:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-21 21:19:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:19:43,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:43,152 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] [2020-08-21 21:19:43,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:19:43,153 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:43,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-21 21:19:43,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:43,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726991880] [2020-08-21 21:19:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:19:43,230 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:19:43,230 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:19:43,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:19:43,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:19:43 BoogieIcfgContainer [2020-08-21 21:19:43,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:19:43,258 INFO L168 Benchmark]: Toolchain (without parser) took 1976.85 ms. Allocated memory was 148.4 MB in the beginning and 203.4 MB in the end (delta: 55.1 MB). Free memory was 102.2 MB in the beginning and 95.5 MB in the end (delta: 6.7 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:43,260 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-21 21:19:43,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 447.36 ms. Allocated memory was 148.4 MB in the beginning and 203.4 MB in the end (delta: 55.1 MB). Free memory was 102.0 MB in the beginning and 179.1 MB in the end (delta: -77.2 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:43,262 INFO L168 Benchmark]: Boogie Preprocessor took 55.15 ms. Allocated memory is still 203.4 MB. Free memory was 179.1 MB in the beginning and 176.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:43,263 INFO L168 Benchmark]: RCFGBuilder took 586.74 ms. Allocated memory is still 203.4 MB. Free memory was 176.6 MB in the beginning and 148.3 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:43,264 INFO L168 Benchmark]: TraceAbstraction took 882.88 ms. Allocated memory is still 203.4 MB. Free memory was 148.3 MB in the beginning and 95.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:43,268 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 148.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 447.36 ms. Allocated memory was 148.4 MB in the beginning and 203.4 MB in the end (delta: 55.1 MB). Free memory was 102.0 MB in the beginning and 179.1 MB in the end (delta: -77.2 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 55.15 ms. Allocated memory is still 203.4 MB. Free memory was 179.1 MB in the beginning and 176.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 586.74 ms. Allocated memory is still 203.4 MB. Free memory was 176.6 MB in the beginning and 148.3 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 882.88 ms. Allocated memory is still 203.4 MB. Free memory was 148.3 MB in the beginning and 95.5 MB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...