/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_interval.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:08:53,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:08:53,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:08:53,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:08:53,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:08:53,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:08:53,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:08:53,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:08:53,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:08:53,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:08:53,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:08:53,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:08:53,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:08:53,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:08:53,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:08:53,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:08:53,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:08:53,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:08:53,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:08:53,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:08:53,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:08:53,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:08:53,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:08:53,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:08:53,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:08:53,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:08:53,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:08:53,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:08:53,829 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 07:08:53,860 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:08:53,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:08:53,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 07:08:53,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 07:08:53,861 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 07:08:53,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 07:08:53,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 07:08:53,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 07:08:53,862 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 07:08:53,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:08:53,863 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:08:53,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:08:53,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:08:53,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:08:53,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:08:53,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:08:53,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:08:53,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:08:53,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:08:53,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 07:08:53,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 07:08:53,865 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:08:53,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 07:08:53,865 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 07:08:53,865 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 07:08:53,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 07:08:53,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:08:54,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:08:54,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:08:54,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:08:54,113 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:08:54,114 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:08:54,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_interval.c [2022-01-31 07:08:54,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03cfbe323/3641ad32d4da45ceb3ae3a67eebf7736/FLAG9b99cc946 [2022-01-31 07:08:54,512 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:08:54,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Householder_interval.c [2022-01-31 07:08:54,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03cfbe323/3641ad32d4da45ceb3ae3a67eebf7736/FLAG9b99cc946 [2022-01-31 07:08:54,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03cfbe323/3641ad32d4da45ceb3ae3a67eebf7736 [2022-01-31 07:08:54,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:08:54,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 07:08:54,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:08:54,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:08:54,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:08:54,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d2e42d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54, skipping insertion in model container [2022-01-31 07:08:54,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:08:54,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:08:54,682 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Householder_interval.c[831,844] [2022-01-31 07:08:54,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:08:54,731 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:08:54,739 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Householder_interval.c[831,844] [2022-01-31 07:08:54,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:08:54,754 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:08:54,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54 WrapperNode [2022-01-31 07:08:54,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:08:54,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:08:54,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:08:54,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:08:54,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:08:54,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:08:54,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:08:54,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:08:54,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (1/1) ... [2022-01-31 07:08:54,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:08:54,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:08:54,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 07:08:54,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 07:08:54,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:08:54,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:08:54,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:08:54,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 07:08:54,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:08:54,869 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2022-01-31 07:08:54,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:08:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:08:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:08:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:08:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:08:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-01-31 07:08:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:08:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:08:54,931 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:08:54,932 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:08:55,073 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:08:55,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:08:55,085 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 07:08:55,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:08:55 BoogieIcfgContainer [2022-01-31 07:08:55,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:08:55,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:08:55,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:08:55,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:08:55,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:08:54" (1/3) ... [2022-01-31 07:08:55,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b601d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:08:55, skipping insertion in model container [2022-01-31 07:08:55,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:54" (2/3) ... [2022-01-31 07:08:55,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b601d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:08:55, skipping insertion in model container [2022-01-31 07:08:55,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:08:55" (3/3) ... [2022-01-31 07:08:55,116 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_interval.c [2022-01-31 07:08:55,120 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:08:55,120 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:08:55,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:08:55,166 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:08:55,167 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:08:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 07:08:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 07:08:55,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:08:55,191 INFO L514 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] [2022-01-31 07:08:55,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:08:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:08:55,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1075452371, now seen corresponding path program 1 times [2022-01-31 07:08:55,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:08:55,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56704230] [2022-01-31 07:08:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:08:55,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:08:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:08:55,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:08:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:08:55,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 07:08:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:08:55,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 07:08:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:08:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:08:55,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:08:55,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56704230] [2022-01-31 07:08:55,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56704230] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:08:55,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:08:55,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:08:55,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235138850] [2022-01-31 07:08:55,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:08:55,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:08:55,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:08:55,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:08:55,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:08:55,406 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:08:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:08:55,477 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-01-31 07:08:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:08:55,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-31 07:08:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:08:55,488 INFO L225 Difference]: With dead ends: 55 [2022-01-31 07:08:55,488 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 07:08:55,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:08:55,495 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:08:55,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:08:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 07:08:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 07:08:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:08:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-01-31 07:08:55,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2022-01-31 07:08:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:08:55,536 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-01-31 07:08:55,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:08:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-01-31 07:08:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 07:08:55,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:08:55,537 INFO L514 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] [2022-01-31 07:08:55,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:08:55,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:08:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:08:55,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2096520725, now seen corresponding path program 1 times [2022-01-31 07:08:55,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:08:55,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243839359] [2022-01-31 07:08:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:08:55,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:08:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 07:08:55,595 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 07:08:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 07:08:55,647 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 07:08:55,647 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 07:08:55,649 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 07:08:55,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:08:55,654 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 07:08:55,657 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 07:08:55,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:08:55 BoogieIcfgContainer [2022-01-31 07:08:55,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 07:08:55,686 INFO L158 Benchmark]: Toolchain (without parser) took 1154.85ms. Allocated memory was 188.7MB in the beginning and 246.4MB in the end (delta: 57.7MB). Free memory was 131.3MB in the beginning and 176.9MB in the end (delta: -45.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-01-31 07:08:55,686 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 188.7MB. Free memory is still 148.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 07:08:55,687 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.71ms. Allocated memory was 188.7MB in the beginning and 246.4MB in the end (delta: 57.7MB). Free memory was 131.2MB in the beginning and 219.2MB in the end (delta: -88.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-01-31 07:08:55,687 INFO L158 Benchmark]: Boogie Preprocessor took 29.16ms. Allocated memory is still 246.4MB. Free memory was 219.2MB in the beginning and 217.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 07:08:55,688 INFO L158 Benchmark]: RCFGBuilder took 302.12ms. Allocated memory is still 246.4MB. Free memory was 217.8MB in the beginning and 205.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 07:08:55,688 INFO L158 Benchmark]: TraceAbstraction took 578.85ms. Allocated memory is still 246.4MB. Free memory was 205.2MB in the beginning and 176.9MB in the end (delta: 28.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2022-01-31 07:08:55,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 188.7MB. Free memory is still 148.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.71ms. Allocated memory was 188.7MB in the beginning and 246.4MB in the end (delta: 57.7MB). Free memory was 131.2MB in the beginning and 219.2MB in the end (delta: -88.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.16ms. Allocated memory is still 246.4MB. Free memory was 219.2MB in the beginning and 217.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 302.12ms. Allocated memory is still 246.4MB. Free memory was 217.8MB in the beginning and 205.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 578.85ms. Allocated memory is still 246.4MB. Free memory was 205.2MB in the beginning and 176.9MB in the end (delta: 28.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 56, overapproximation of someUnaryDOUBLEoperation at line 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 44. Possible FailurePath: [L22] double _EPS = 1e-6; VAL [\old(_EPS)=49, _EPS=1/1000000] [L49] double d, r; [L51] d = __VERIFIER_nondet_double() [L52] CALL assume_abort_if_not(d >= 0.1 && d <= 20.0) VAL [\old(cond)=1, _EPS=1/1000000] [L18] COND FALSE !(!cond) VAL [\old(cond)=1, _EPS=1/1000000, cond=1] [L52] RET assume_abort_if_not(d >= 0.1 && d <= 20.0) VAL [_EPS=1/1000000, d=52] [L54] CALL, EXPR SqrtR(d) VAL [\old(Input)=52, _EPS=1/1000000] [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; VAL [\old(Input)=52, _EPS=1/1000000, Input=52] [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 VAL [\old(Input)=52, _EPS=1/1000000, Input=52, xn=1] [L29] xnp1 = xn [L30] residu = 2.0*_EPS*(xn+xnp1) [L31] lsup = _EPS * (xn+xnp1) [L32] linf = -lsup [L33] cond = ((residu > lsup) || (residu < linf)) [L34] i = 0 VAL [\old(Input)=52, _EPS=1/1000000, cond=0, i=0, Input=52, xn=1, xn=1] [L35] COND FALSE !(\read(cond)) VAL [\old(Input)=52, _EPS=1/1000000, cond=0, i=0, Input=52, xn=1, xn=1] [L44] return 1.0 / xnp1; VAL [\old(Input)=52, _EPS=1/1000000, cond=0, i=0, Input=52, xn=1, xn=1] [L54] RET, EXPR SqrtR(d) VAL [_EPS=1/1000000, d=52, SqrtR(d)=51] [L54] r = SqrtR(d) [L56] CALL __VERIFIER_assert(r >= 0.3 && r <= 5.) VAL [\old(cond)=0, _EPS=1/1000000] [L20] COND TRUE !(cond) VAL [\old(cond)=0, _EPS=1/1000000, cond=0] [L20] reach_error() VAL [\old(cond)=0, _EPS=1/1000000, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 23 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 30 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 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 [2022-01-31 07:08:55,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...