/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_constant.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:08:50,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:08:50,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:08:50,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 07:08:50,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:08:50,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:08:50,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:08:50,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:08:50,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:08:50,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:08:50,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:08:50,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:08:50,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:08:50,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:08:50,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:08:50,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:08:50,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:08:50,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:08:50,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:08:50,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:08:50,502 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 07:08:50,526 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:08:50,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:08:50,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 07:08:50,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 07:08:50,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 07:08:50,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 07:08:50,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 07:08:50,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 07:08:50,527 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 07:08:50,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:08:50,528 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:08:50,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:08:50,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:08:50,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:08:50,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:08:50,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:08:50,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:08:50,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 07:08:50,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 07:08:50,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:08:50,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 07:08:50,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 07:08:50,530 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 07:08:50,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 07:08:50,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:08:50,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:08:50,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:08:50,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:08:50,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:08:50,735 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:08:50,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c [2022-01-31 07:08:50,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515446160/d903f2dd29b34d3d83ae513e40d7c36c/FLAGd4bcfb03a [2022-01-31 07:08:51,101 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:08:51,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Householder_constant.c [2022-01-31 07:08:51,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515446160/d903f2dd29b34d3d83ae513e40d7c36c/FLAGd4bcfb03a [2022-01-31 07:08:51,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515446160/d903f2dd29b34d3d83ae513e40d7c36c [2022-01-31 07:08:51,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:08:51,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 07:08:51,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:08:51,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:08:51,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:08:51,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58a67259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51, skipping insertion in model container [2022-01-31 07:08:51,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:08:51,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:08:51,656 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_constant.c[831,844] [2022-01-31 07:08:51,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:08:51,676 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:08:51,686 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_constant.c[831,844] [2022-01-31 07:08:51,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:08:51,700 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:08:51,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51 WrapperNode [2022-01-31 07:08:51,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:08:51,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:08:51,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:08:51,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:08:51,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:08:51,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:08:51,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:08:51,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:08:51,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (1/1) ... [2022-01-31 07:08:51,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:08:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:08:51,750 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 07:08:51,755 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 07:08:51,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:08:51,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:08:51,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:08:51,792 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 07:08:51,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:08:51,793 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2022-01-31 07:08:51,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2022-01-31 07:08:51,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:08:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:08:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:08:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:08:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:08:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:08:51,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:08:51,843 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:08:51,844 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:08:51,933 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:08:51,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:08:51,940 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 07:08:51,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:08:51 BoogieIcfgContainer [2022-01-31 07:08:51,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:08:51,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:08:51,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:08:51,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:08:51,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:08:51" (1/3) ... [2022-01-31 07:08:51,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526f0988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:08:51, skipping insertion in model container [2022-01-31 07:08:51,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:08:51" (2/3) ... [2022-01-31 07:08:51,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526f0988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:08:51, skipping insertion in model container [2022-01-31 07:08:51,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:08:51" (3/3) ... [2022-01-31 07:08:51,947 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Householder_constant.c [2022-01-31 07:08:51,950 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:08:51,950 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:08:51,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:08:51,982 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 07:08:51,982 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:08:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 07:08:51,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 07:08:51,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:08:51,996 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] [2022-01-31 07:08:51,997 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:08:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:08:52,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1317333049, now seen corresponding path program 1 times [2022-01-31 07:08:52,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:08:52,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700619156] [2022-01-31 07:08:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:08:52,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:08:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:08:52,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:08:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:08:52,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 07:08:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:08:52,128 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 07:08:52,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:08:52,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700619156] [2022-01-31 07:08:52,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700619156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:08:52,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:08:52,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:08:52,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123193210] [2022-01-31 07:08:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:08:52,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:08:52,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:08:52,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:08:52,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:08:52,153 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:08:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:08:52,183 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-01-31 07:08:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:08:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 07:08:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:08:52,189 INFO L225 Difference]: With dead ends: 52 [2022-01-31 07:08:52,189 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 07:08:52,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 07:08:52,193 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:08:52,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:08:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 07:08:52,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 07:08:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:08:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 07:08:52,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2022-01-31 07:08:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:08:52,216 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 07:08:52,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 07:08:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 07:08:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 07:08:52,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:08:52,218 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] [2022-01-31 07:08:52,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:08:52,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:08:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:08:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1617517507, now seen corresponding path program 1 times [2022-01-31 07:08:52,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:08:52,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341618109] [2022-01-31 07:08:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:08:52,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:08:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 07:08:52,239 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 07:08:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 07:08:52,279 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-31 07:08:52,279 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 07:08:52,280 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 07:08:52,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:08:52,284 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 07:08:52,286 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 07:08:52,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:08:52 BoogieIcfgContainer [2022-01-31 07:08:52,303 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 07:08:52,304 INFO L158 Benchmark]: Toolchain (without parser) took 787.10ms. Allocated memory was 205.5MB in the beginning and 257.9MB in the end (delta: 52.4MB). Free memory was 151.7MB in the beginning and 192.0MB in the end (delta: -40.2MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-01-31 07:08:52,305 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 205.5MB. Free memory is still 167.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 07:08:52,305 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.00ms. Allocated memory was 205.5MB in the beginning and 257.9MB in the end (delta: 52.4MB). Free memory was 151.5MB in the beginning and 231.8MB in the end (delta: -80.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-31 07:08:52,305 INFO L158 Benchmark]: Boogie Preprocessor took 23.32ms. Allocated memory is still 257.9MB. Free memory was 231.8MB in the beginning and 230.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 07:08:52,306 INFO L158 Benchmark]: RCFGBuilder took 216.23ms. Allocated memory is still 257.9MB. Free memory was 230.1MB in the beginning and 219.2MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 07:08:52,306 INFO L158 Benchmark]: TraceAbstraction took 360.99ms. Allocated memory is still 257.9MB. Free memory was 218.9MB in the beginning and 192.0MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-01-31 07:08:52,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 205.5MB. Free memory is still 167.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.00ms. Allocated memory was 205.5MB in the beginning and 257.9MB in the end (delta: 52.4MB). Free memory was 151.5MB in the beginning and 231.8MB in the end (delta: -80.3MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.32ms. Allocated memory is still 257.9MB. Free memory was 231.8MB in the beginning and 230.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 216.23ms. Allocated memory is still 257.9MB. Free memory was 230.1MB in the beginning and 219.2MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 360.99ms. Allocated memory is still 257.9MB. Free memory was 218.9MB in the beginning and 192.0MB in the end (delta: 26.9MB). Peak memory consumption was 27.3MB. 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 55, 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 = 1. VAL [_EPS=1/1000000, d=1] [L51] COND TRUE d <= 20. VAL [_EPS=1/1000000, d=1] [L53] CALL, EXPR SqrtR(d) VAL [\old(Input)=1, _EPS=1/1000000] [L26] double xn, xnp1, residu, lsup, linf; [L27] int i, cond; VAL [\old(Input)=1, _EPS=1/1000000, Input=1] [L28] COND TRUE Input <= 1.0 [L28] xn = 1.0 VAL [\old(Input)=1, _EPS=1/1000000, Input=1, 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)=1, _EPS=1/1000000, cond=0, i=0, Input=1, xn=1, xn=1] [L35] COND FALSE !(\read(cond)) VAL [\old(Input)=1, _EPS=1/1000000, cond=0, i=0, Input=1, xn=1, xn=1] [L44] return 1.0 / xnp1; VAL [\old(Input)=1, _EPS=1/1000000, cond=0, i=0, Input=1, xn=1, xn=1] [L53] RET, EXPR SqrtR(d) VAL [_EPS=1/1000000, d=1, SqrtR(d)=51] [L53] r = SqrtR(d) [L55] CALL __VERIFIER_assert(r >= 1.0 && r <= 5.0) 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, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, 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, 22 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4 IncrementalHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 29 mSDtfsCounter, 4 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 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 07:08:52,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...