/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -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 0.1.25-5644d1e-m [2020-08-18 23:29:08,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:29:08,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:29:08,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:29:08,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:29:08,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:29:08,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:29:08,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:29:08,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:29:08,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:29:08,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:29:08,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:29:08,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:29:08,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:29:08,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:29:08,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:29:08,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:29:08,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:29:08,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:29:08,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:29:08,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:29:08,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:29:08,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:29:08,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:29:08,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:29:08,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:29:08,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:29:08,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:29:08,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:29:08,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:29:08,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:29:08,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:29:08,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:29:08,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:29:08,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:29:08,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:29:08,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:29:08,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:29:08,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:29:08,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:29:08,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:29:08,963 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 [2020-08-18 23:29:08,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:29:08,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:29:08,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:29:08,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:29:08,987 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:29:08,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:29:08,987 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:29:08,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:29:08,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:29:08,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:29:08,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:29:08,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:29:08,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:29:08,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:29:08,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:29:08,992 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:29:08,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:29:08,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:29:08,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:29:08,993 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:29:08,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:29:08,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:29:08,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:29:08,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:29:08,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:29:08,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:29:08,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:29:08,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:29:08,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:29:08,998 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:29:09,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:29:09,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:29:09,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:29:09,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:29:09,357 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:29:09,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 23:29:09,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a7ce159b/88436ad42a65436984a538216f4b782a/FLAG977222b61 [2020-08-18 23:29:09,860 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:29:09,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 23:29:09,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a7ce159b/88436ad42a65436984a538216f4b782a/FLAG977222b61 [2020-08-18 23:29:10,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a7ce159b/88436ad42a65436984a538216f4b782a [2020-08-18 23:29:10,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:29:10,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:29:10,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:29:10,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:29:10,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:29:10,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c7bf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10, skipping insertion in model container [2020-08-18 23:29:10,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:29:10,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:29:10,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:29:10,512 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:29:10,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:29:10,657 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:29:10,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10 WrapperNode [2020-08-18 23:29:10,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:29:10,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:29:10,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:29:10,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:29:10,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (1/1) ... [2020-08-18 23:29:10,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:29:10,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:29:10,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:29:10,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:29:10,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (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 [2020-08-18 23:29:10,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:29:10,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:29:10,793 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 23:29:10,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 23:29:10,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:29:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:29:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 23:29:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 23:29:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 23:29:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 23:29:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 23:29:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:29:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 23:29:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 23:29:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 23:29:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:29:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:29:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 23:29:10,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:29:11,247 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:29:11,247 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 23:29:11,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:11 BoogieIcfgContainer [2020-08-18 23:29:11,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:29:11,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:29:11,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:29:11,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:29:11,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:29:10" (1/3) ... [2020-08-18 23:29:11,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ef2f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:11, skipping insertion in model container [2020-08-18 23:29:11,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:10" (2/3) ... [2020-08-18 23:29:11,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ef2f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:11, skipping insertion in model container [2020-08-18 23:29:11,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:11" (3/3) ... [2020-08-18 23:29:11,258 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-18 23:29:11,268 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:29:11,276 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:29:11,290 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:29:11,310 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:29:11,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:29:11,310 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:29:11,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:29:11,310 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:29:11,311 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:29:11,311 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:29:11,311 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:29:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 23:29:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:29:11,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:11,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:29:11,335 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-18 23:29:11,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:11,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677703945] [2020-08-18 23:29:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:11,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:11,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:29:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:29:11,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677703945] [2020-08-18 23:29:11,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:29:11,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:29:11,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548389893] [2020-08-18 23:29:11,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:29:11,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:29:11,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:29:11,602 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 23:29:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:11,866 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-18 23:29:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:29:11,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 23:29:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:11,879 INFO L225 Difference]: With dead ends: 116 [2020-08-18 23:29:11,879 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 23:29:11,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:29:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 23:29:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-18 23:29:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 23:29:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-18 23:29:11,930 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-18 23:29:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:11,930 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-18 23:29:11,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:29:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-18 23:29:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:29:11,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:11,932 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] [2020-08-18 23:29:11,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:29:11,933 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-18 23:29:11,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:11,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108503035] [2020-08-18 23:29:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:29:12,009 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:29:12,010 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:29:12,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:29:12,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:29:12 BoogieIcfgContainer [2020-08-18 23:29:12,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:29:12,043 INFO L168 Benchmark]: Toolchain (without parser) took 1794.56 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 102.7 MB in the beginning and 95.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 63.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:12,044 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 23:29:12,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.91 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 102.5 MB in the beginning and 179.4 MB in the end (delta: -76.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:12,046 INFO L168 Benchmark]: Boogie Preprocessor took 74.29 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 176.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:12,047 INFO L168 Benchmark]: RCFGBuilder took 518.44 ms. Allocated memory is still 202.9 MB. Free memory was 176.8 MB in the beginning and 148.4 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:12,048 INFO L168 Benchmark]: TraceAbstraction took 788.61 ms. Allocated memory is still 202.9 MB. Free memory was 147.8 MB in the beginning and 95.1 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:12,052 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 408.91 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 102.5 MB in the beginning and 179.4 MB in the end (delta: -76.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.29 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 176.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 518.44 ms. Allocated memory is still 202.9 MB. Free memory was 176.8 MB in the beginning and 148.4 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 788.61 ms. Allocated memory is still 202.9 MB. Free memory was 147.8 MB in the beginning and 95.1 MB in the end (delta: 52.7 MB). Peak memory consumption was 52.7 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: 0.2s, 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, 0.0s 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, 0.0s 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...