/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=HIGHLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 19:27:16,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 19:27:16,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 19:27:16,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 19:27:16,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 19:27:16,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 19:27:16,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 19:27:16,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 19:27:16,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 19:27:16,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 19:27:16,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 19:27:16,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 19:27:16,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 19:27:16,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 19:27:16,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 19:27:16,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 19:27:16,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 19:27:16,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 19:27:16,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 19:27:16,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 19:27:16,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 19:27:16,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 19:27:16,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 19:27:16,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 19:27:16,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 19:27:16,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 19:27:16,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 19:27:16,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 19:27:16,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 19:27:16,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 19:27:16,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 19:27:16,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 19:27:16,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 19:27:16,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 19:27:16,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 19:27:16,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 19:27:16,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 19:27:16,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 19:27:16,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 19:27:16,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 19:27:16,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 19:27:16,999 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 19:27:17,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 19:27:17,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 19:27:17,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 19:27:17,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 19:27:17,044 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 19:27:17,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 19:27:17,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 19:27:17,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 19:27:17,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 19:27:17,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 19:27:17,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 19:27:17,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 19:27:17,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 19:27:17,047 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 19:27:17,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 19:27:17,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 19:27:17,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 19:27:17,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 19:27:17,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 19:27:17,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 19:27:17,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 19:27:17,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 19:27:17,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 19:27:17,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 19:27:17,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 19:27:17,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 19:27:17,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 19:27:17,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 19:27:17,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 19:27:17,050 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=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 19:27:17,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 19:27:17,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 19:27:17,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 19:27:17,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 19:27:17,365 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 19:27:17,365 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-18 19:27:17,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f18eb3567/0017181da298409d948542122beab56d/FLAG4839e11aa [2020-08-18 19:27:17,915 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 19:27:17,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1131b.c [2020-08-18 19:27:17,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f18eb3567/0017181da298409d948542122beab56d/FLAG4839e11aa [2020-08-18 19:27:18,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f18eb3567/0017181da298409d948542122beab56d [2020-08-18 19:27:18,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 19:27:18,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 19:27:18,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 19:27:18,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 19:27:18,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 19:27:18,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e93eba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18, skipping insertion in model container [2020-08-18 19:27:18,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 19:27:18,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 19:27:18,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:27:18,529 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 19:27:18,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 19:27:18,678 INFO L208 MainTranslator]: Completed translation [2020-08-18 19:27:18,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18 WrapperNode [2020-08-18 19:27:18,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 19:27:18,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 19:27:18,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 19:27:18,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 19:27:18,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (1/1) ... [2020-08-18 19:27:18,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 19:27:18,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 19:27:18,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 19:27:18,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 19:27:18,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (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 19:27:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 19:27:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 19:27:18,803 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 19:27:18,804 INFO L138 BoogieDeclarations]: Found implementation of procedure isfinite_float [2020-08-18 19:27:18,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 19:27:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 19:27:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 19:27:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 19:27:18,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 19:27:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 19:27:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 19:27:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 19:27:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 19:27:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 19:27:18,805 INFO L130 BoogieDeclarations]: Found specification of procedure isfinite_float [2020-08-18 19:27:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 19:27:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 19:27:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 19:27:18,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 19:27:19,285 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 19:27:19,286 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 19:27:19,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:27:19 BoogieIcfgContainer [2020-08-18 19:27:19,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 19:27:19,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 19:27:19,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 19:27:19,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 19:27:19,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 07:27:18" (1/3) ... [2020-08-18 19:27:19,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4380c575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:27:19, skipping insertion in model container [2020-08-18 19:27:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 07:27:18" (2/3) ... [2020-08-18 19:27:19,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4380c575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 07:27:19, skipping insertion in model container [2020-08-18 19:27:19,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 07:27:19" (3/3) ... [2020-08-18 19:27:19,300 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1131b.c [2020-08-18 19:27:19,310 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 19:27:19,318 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 19:27:19,333 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 19:27:19,366 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 19:27:19,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 19:27:19,366 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 19:27:19,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 19:27:19,367 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 19:27:19,367 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 19:27:19,367 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 19:27:19,367 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 19:27:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-08-18 19:27:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 19:27:19,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:19,400 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, 1, 1] [2020-08-18 19:27:19,400 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1081724134, now seen corresponding path program 1 times [2020-08-18 19:27:19,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:19,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877150889] [2020-08-18 19:27:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:19,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 19:27:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:19,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 19:27:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:19,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-18 19:27:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 19:27:19,662 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 19:27:19,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877150889] [2020-08-18 19:27:19,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 19:27:19,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 19:27:19,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494136258] [2020-08-18 19:27:19,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 19:27:19,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 19:27:19,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 19:27:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 19:27:19,691 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 4 states. [2020-08-18 19:27:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 19:27:19,961 INFO L93 Difference]: Finished difference Result 112 states and 175 transitions. [2020-08-18 19:27:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 19:27:19,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-08-18 19:27:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 19:27:19,975 INFO L225 Difference]: With dead ends: 112 [2020-08-18 19:27:19,975 INFO L226 Difference]: Without dead ends: 55 [2020-08-18 19:27:19,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 19:27:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-18 19:27:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-08-18 19:27:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 19:27:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-08-18 19:27:20,031 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2020-08-18 19:27:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 19:27:20,032 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-08-18 19:27:20,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 19:27:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-08-18 19:27:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 19:27:20,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 19:27:20,034 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, 1, 1, 1, 1, 1] [2020-08-18 19:27:20,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 19:27:20,035 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 19:27:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 19:27:20,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884658, now seen corresponding path program 1 times [2020-08-18 19:27:20,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 19:27:20,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643650466] [2020-08-18 19:27:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 19:27:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 19:27:20,154 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 19:27:20,156 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 19:27:20,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 19:27:20,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 07:27:20 BoogieIcfgContainer [2020-08-18 19:27:20,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 19:27:20,212 INFO L168 Benchmark]: Toolchain (without parser) took 1956.94 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 103.4 MB in the beginning and 95.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 71.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:20,213 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 19:27:20,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 426.40 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 179.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:20,219 INFO L168 Benchmark]: Boogie Preprocessor took 56.52 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 177.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:20,220 INFO L168 Benchmark]: RCFGBuilder took 554.77 ms. Allocated memory is still 203.4 MB. Free memory was 177.4 MB in the beginning and 149.6 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:20,221 INFO L168 Benchmark]: TraceAbstraction took 914.66 ms. Allocated memory is still 203.4 MB. Free memory was 148.9 MB in the beginning and 95.3 MB in the end (delta: 53.6 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB. [2020-08-18 19:27:20,225 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 426.40 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 103.2 MB in the beginning and 179.5 MB in the end (delta: -76.3 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.52 ms. Allocated memory is still 203.4 MB. Free memory was 179.5 MB in the beginning and 177.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 554.77 ms. Allocated memory is still 203.4 MB. Free memory was 177.4 MB in the beginning and 149.6 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 914.66 ms. Allocated memory is still 203.4 MB. Free memory was 148.9 MB in the beginning and 95.3 MB in the end (delta: 53.6 MB). Peak memory consumption was 53.6 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 someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseXor at line 31. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = __VERIFIER_nondet_float(); [L127] float y = -1.0f / 0.0f; [L129] CALL isfinite_float(x) [L109] __int32_t ix; [L111] ieee_float_shape_type gf_u; [L112] gf_u.value = (x) [L113] EXPR gf_u.word [L113] (ix) = gf_u.word [L115] ix &= 0x7fffffff [L116] return (((ix) < 0x7f800000L)); [L129] RET isfinite_float(x) [L129] COND TRUE isfinite_float(x) [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] COND TRUE res != x [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 6 SDslu, 63 SDs, 0 SdLazy, 78 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1656 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...