/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 22:55:41,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 22:55:41,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 22:55:42,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 22:55:42,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 22:55:42,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 22:55:42,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 22:55:42,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 22:55:42,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 22:55:42,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 22:55:42,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 22:55:42,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 22:55:42,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 22:55:42,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 22:55:42,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 22:55:42,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 22:55:42,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 22:55:42,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 22:55:42,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 22:55:42,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 22:55:42,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 22:55:42,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 22:55:42,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 22:55:42,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 22:55:42,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 22:55:42,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 22:55:42,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 22:55:42,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 22:55:42,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 22:55:42,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 22:55:42,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 22:55:42,103 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 22:55:42,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:55:42,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 22:55:42,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 22:55:42,105 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 22:55:42,105 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 22:55:42,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 22:55:42,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 22:55:42,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 22:55:42,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 22:55:42,299 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 22:55:42,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2022-01-31 22:55:42,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb34e3322/e42b7655b92c424d99f7f87cbbf913e1/FLAG7eca65f49 [2022-01-31 22:55:42,681 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 22:55:42,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_poly2.c [2022-01-31 22:55:42,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb34e3322/e42b7655b92c424d99f7f87cbbf913e1/FLAG7eca65f49 [2022-01-31 22:55:43,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb34e3322/e42b7655b92c424d99f7f87cbbf913e1 [2022-01-31 22:55:43,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 22:55:43,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 22:55:43,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 22:55:43,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 22:55:43,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 22:55:43,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce5cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43, skipping insertion in model container [2022-01-31 22:55:43,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 22:55:43,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 22:55:43,294 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_poly2.c[587,600] [2022-01-31 22:55:43,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:55:43,309 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 22:55:43,315 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_poly2.c[587,600] [2022-01-31 22:55:43,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:55:43,332 INFO L208 MainTranslator]: Completed translation [2022-01-31 22:55:43,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43 WrapperNode [2022-01-31 22:55:43,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 22:55:43,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 22:55:43,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 22:55:43,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 22:55:43,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 22:55:43,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 22:55:43,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 22:55:43,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 22:55:43,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (1/1) ... [2022-01-31 22:55:43,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:55:43,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 22:55:43,372 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 22:55:43,390 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 22:55:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 22:55:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 22:55:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 22:55:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 22:55:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 22:55:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure sqrt_custom [2022-01-31 22:55:43,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure sqrt_custom [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 22:55:43,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 22:55:43,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 22:55:43,440 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 22:55:43,442 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 22:55:43,530 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 22:55:43,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 22:55:43,534 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-31 22:55:43,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:55:43 BoogieIcfgContainer [2022-01-31 22:55:43,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 22:55:43,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 22:55:43,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 22:55:43,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 22:55:43,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:55:43" (1/3) ... [2022-01-31 22:55:43,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45370ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:55:43, skipping insertion in model container [2022-01-31 22:55:43,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:43" (2/3) ... [2022-01-31 22:55:43,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45370ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:55:43, skipping insertion in model container [2022-01-31 22:55:43,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:55:43" (3/3) ... [2022-01-31 22:55:43,540 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_poly2.c [2022-01-31 22:55:43,543 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 22:55:43,543 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 22:55:43,568 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 22:55:43,572 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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=JORDAN [2022-01-31 22:55:43,573 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 22:55:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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 22:55:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 22:55:43,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:43,586 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] [2022-01-31 22:55:43,586 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1208131300, now seen corresponding path program 1 times [2022-01-31 22:55:43,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:43,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086957626] [2022-01-31 22:55:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:43,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:43,630 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:43,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:43,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 22:55:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:43,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 22:55:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:43,843 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 22:55:43,844 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:43,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086957626] [2022-01-31 22:55:43,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086957626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:43,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:43,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:55:43,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588008574] [2022-01-31 22:55:43,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:43,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:55:43,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:55:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:55:43,876 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 4 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 22:55:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:44,004 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-31 22:55:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 22:55:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 4 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 22 [2022-01-31 22:55:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:44,011 INFO L225 Difference]: With dead ends: 51 [2022-01-31 22:55:44,011 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 22:55:44,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:55:44,015 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:44,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 22:55:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 22:55:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 22:55:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 22:55:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-01-31 22:55:44,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 22 [2022-01-31 22:55:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:44,060 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-01-31 22:55:44,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 4 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 22:55:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-01-31 22:55:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 22:55:44,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:44,062 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] [2022-01-31 22:55:44,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 22:55:44,063 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:44,064 INFO L85 PathProgramCache]: Analyzing trace with hash 197014050, now seen corresponding path program 1 times [2022-01-31 22:55:44,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:44,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698541555] [2022-01-31 22:55:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:44,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:44,072 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:55:44,130 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 22:55:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:55:44,200 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 22:55:44,201 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 22:55:44,204 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 22:55:44,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 22:55:44,210 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 22:55:44,212 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 22:55:44,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:55:44 BoogieIcfgContainer [2022-01-31 22:55:44,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 22:55:44,223 INFO L158 Benchmark]: Toolchain (without parser) took 1084.02ms. Allocated memory is still 199.2MB. Free memory was 150.0MB in the beginning and 121.1MB in the end (delta: 28.9MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2022-01-31 22:55:44,223 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 199.2MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 22:55:44,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.48ms. Allocated memory is still 199.2MB. Free memory was 149.9MB in the beginning and 175.6MB in the end (delta: -25.7MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-01-31 22:55:44,228 INFO L158 Benchmark]: Boogie Preprocessor took 18.57ms. Allocated memory is still 199.2MB. Free memory was 175.6MB in the beginning and 174.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 22:55:44,229 INFO L158 Benchmark]: RCFGBuilder took 183.41ms. Allocated memory is still 199.2MB. Free memory was 174.0MB in the beginning and 162.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 22:55:44,229 INFO L158 Benchmark]: TraceAbstraction took 686.06ms. Allocated memory is still 199.2MB. Free memory was 162.0MB in the beginning and 121.1MB in the end (delta: 40.9MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2022-01-31 22:55:44,236 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 199.2MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.48ms. Allocated memory is still 199.2MB. Free memory was 149.9MB in the beginning and 175.6MB in the end (delta: -25.7MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.57ms. Allocated memory is still 199.2MB. Free memory was 175.6MB in the beginning and 174.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 183.41ms. Allocated memory is still 199.2MB. Free memory was 174.0MB in the beginning and 162.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 686.06ms. Allocated memory is still 199.2MB. Free memory was 162.0MB in the beginning and 121.1MB in the end (delta: 40.9MB). Peak memory consumption was 40.9MB. 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: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 38, overapproximation of someUnaryDOUBLEoperation at line 20, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, overapproximation of bitwiseAnd at line 37, overapproximation of someBinaryDOUBLEComparisonOperation at line 65. Possible FailurePath: [L17] double C0 = 1.414213538; [L18] double C1 = 0.229761391; [L19] double C2 = 1.296735525; [L20] double C3 = -0.901098370; [L21] double C4 = 0.493553400; [L22] double C5 = -0.118958666; [L58] double x,y; [L60] x = __VERIFIER_nondet_double() [L61] CALL assume_abort_if_not(x >= 1. && x <= 1e10) [L12] COND FALSE !(!cond) [L61] RET assume_abort_if_not(x >= 1. && x <= 1e10) [L63] CALL, EXPR sqrt_custom(x) [L31] union u x; [L32] double r; [L33] int exp; [L35] x.d = a [L37] EXPR x.i[0] [L37] exp = (x.i[0] & 0x7FF00000) >> 20 [L38] EXPR x.i[0] [L38] x.i[0] = (x.i[0] & 0x800FFFFF) | 0x3FF00000 [L39] EXPR x.d [L39] r = x.d * 0.5 [L41] r = C1+C2+(C3+(C4+C5*r)*r)*r [L43] COND TRUE exp % 2 == 0 [L44] exp++ [L50] x.i[0] = (exp/2 + 511) << 20 [L51] EXPR x.d [L51] r = r * x.d [L53] return r; [L53] return r; [L63] RET, EXPR sqrt_custom(x) [L63] y = sqrt_custom(x) [L65] CALL __VERIFIER_assert(y >= 0. && y <= 1e6) [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21 IncrementalHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 25 mSDtfsCounter, 21 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 5, 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: No data available, 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 22:55:44,257 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...