/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:50:34,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:50:34,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:50:34,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:50:34,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:50:34,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:50:34,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:50:34,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:50:34,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:50:34,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:50:34,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:50:34,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:50:34,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:50:34,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:50:34,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:50:34,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:50:34,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:50:34,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:50:34,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:50:34,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:50:34,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:50:34,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:50:34,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:50:34,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:50:34,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:50:34,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:50:34,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:50:34,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:50:34,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:50:34,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:50:34,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:50:34,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:50:34,906 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:50:34,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:50:34,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:50:34,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:50:34,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:50:34,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:50:34,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:50:34,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:50:34,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:50:34,911 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 [2020-08-18 17:50:34,933 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:50:34,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:50:34,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:50:34,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:50:34,935 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:50:34,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:50:34,936 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:50:34,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:50:34,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:50:34,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:50:34,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:50:34,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:50:34,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:50:34,937 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:50:34,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:50:34,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:50:34,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:50:34,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:50:34,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:50:34,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:50:34,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:50:34,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:50:34,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:50:34,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:50:34,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:50:34,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:50:34,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:50:34,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:50:34,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:50:34,940 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:50:35,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:50:35,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:50:35,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:50:35,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:50:35,251 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:50:35,252 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-08-18 17:50:35,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/346cd12c1/23635a4aaf664e35891e4bd6f0c4edad/FLAGd8942032d [2020-08-18 17:50:35,750 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:50:35,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-08-18 17:50:35,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/346cd12c1/23635a4aaf664e35891e4bd6f0c4edad/FLAGd8942032d [2020-08-18 17:50:36,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/346cd12c1/23635a4aaf664e35891e4bd6f0c4edad [2020-08-18 17:50:36,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:50:36,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:50:36,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:36,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:50:36,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:50:36,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9d4757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36, skipping insertion in model container [2020-08-18 17:50:36,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:50:36,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:50:36,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:36,347 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:50:36,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:36,498 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:50:36,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36 WrapperNode [2020-08-18 17:50:36,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:36,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:50:36,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:50:36,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:50:36,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (1/1) ... [2020-08-18 17:50:36,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:50:36,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:50:36,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:50:36,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:50:36,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (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 17:50:36,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:50:36,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:50:36,615 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-08-18 17:50:36,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 17:50:36,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:50:36,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:50:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 17:50:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-08-18 17:50:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:50:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 17:50:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:50:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:50:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:50:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 17:50:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 17:50:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:50:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:50:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:50:36,893 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:50:36,894 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-18 17:50:36,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:36 BoogieIcfgContainer [2020-08-18 17:50:36,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:50:36,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:50:36,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:50:36,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:50:36,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:50:36" (1/3) ... [2020-08-18 17:50:36,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d99ea3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:36, skipping insertion in model container [2020-08-18 17:50:36,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:36" (2/3) ... [2020-08-18 17:50:36,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d99ea3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:36, skipping insertion in model container [2020-08-18 17:50:36,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:36" (3/3) ... [2020-08-18 17:50:36,920 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-08-18 17:50:36,955 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:50:36,972 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:50:37,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:50:37,042 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:50:37,042 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:50:37,042 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:50:37,043 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:50:37,043 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:50:37,043 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:50:37,043 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:50:37,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:50:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 17:50:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:50:37,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:37,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:37,077 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1483749764, now seen corresponding path program 1 times [2020-08-18 17:50:37,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:37,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743066364] [2020-08-18 17:50:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:37,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:37,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:50:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:37,371 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 17:50:37,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743066364] [2020-08-18 17:50:37,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:37,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:50:37,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207723449] [2020-08-18 17:50:37,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:50:37,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:50:37,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:50:37,402 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-08-18 17:50:37,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:37,650 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-08-18 17:50:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:50:37,652 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-18 17:50:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:37,664 INFO L225 Difference]: With dead ends: 68 [2020-08-18 17:50:37,664 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 17:50:37,668 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 [2020-08-18 17:50:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 17:50:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-18 17:50:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 17:50:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-08-18 17:50:37,711 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-08-18 17:50:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:37,711 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-08-18 17:50:37,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:50:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-08-18 17:50:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 17:50:37,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:37,713 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 17:50:37,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:50:37,714 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash 262345377, now seen corresponding path program 1 times [2020-08-18 17:50:37,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:37,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331951465] [2020-08-18 17:50:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:50:37,772 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:50:37,773 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:50:37,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:50:37,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:50:37 BoogieIcfgContainer [2020-08-18 17:50:37,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:50:37,800 INFO L168 Benchmark]: Toolchain (without parser) took 1692.59 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 102.0 MB in the beginning and 117.2 MB in the end (delta: -15.2 MB). Peak memory consumption was 47.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:37,800 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:50:37,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.12 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 180.7 MB in the end (delta: -78.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:37,803 INFO L168 Benchmark]: Boogie Preprocessor took 52.98 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:37,803 INFO L168 Benchmark]: RCFGBuilder took 347.80 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 158.7 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:37,804 INFO L168 Benchmark]: TraceAbstraction took 894.58 ms. Allocated memory is still 201.9 MB. Free memory was 158.1 MB in the beginning and 117.2 MB in the end (delta: 40.8 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:37,808 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 392.12 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.8 MB in the beginning and 180.7 MB in the end (delta: -78.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.98 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.80 ms. Allocated memory is still 201.9 MB. Free memory was 178.2 MB in the beginning and 158.7 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 894.58 ms. Allocated memory is still 201.9 MB. Free memory was 158.1 MB in the beginning and 117.2 MB in the end (delta: 40.8 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 23, overapproximation of someUnaryFLOAToperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L75] float x = -0.0f; [L76] CALL, EXPR round_float(x) [L13] __uint32_t w; [L15] int exponent_less_127; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L25] COND FALSE !(exponent_less_127 < 23) [L41] COND TRUE exponent_less_127 == 128 [L43] return x + x; [L76] RET, EXPR round_float(x) [L76] float res = round_float(x); [L79] EXPR res == -0.0f && __signbit_float(res) == 1 [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 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: 37 SDtfs, 32 SDslu, 5 SDs, 0 SdLazy, 42 SolverSat, 11 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=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 646 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...