/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/interpolation.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 22:53:57,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 22:53:57,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 22:53:57,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 22:53:57,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 22:53:57,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 22:53:57,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 22:53:57,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 22:53:57,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 22:53:57,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 22:53:57,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 22:53:57,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 22:53:57,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 22:53:57,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 22:53:57,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 22:53:57,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 22:53:57,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 22:53:57,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 22:53:57,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 22:53:57,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 22:53:57,554 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 22:53:57,563 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 22:53:57,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 22:53:57,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 22:53:57,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 22:53:57,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 22:53:57,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 22:53:57,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 22:53:57,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 22:53:57,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 22:53:57,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 22:53:57,565 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 22:53:57,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 22:53:57,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 22:53:57,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:53:57,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 22:53:57,566 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 22:53:57,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 22:53:57,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 22:53:57,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 22:53:57,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 22:53:57,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 22:53:57,761 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 22:53:57,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/interpolation.c [2022-01-31 22:53:57,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf766a6ce/5111398b23a344af8446d8df461d525d/FLAGe0738603d [2022-01-31 22:53:58,127 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 22:53:58,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/interpolation.c [2022-01-31 22:53:58,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf766a6ce/5111398b23a344af8446d8df461d525d/FLAGe0738603d [2022-01-31 22:53:58,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf766a6ce/5111398b23a344af8446d8df461d525d [2022-01-31 22:53:58,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 22:53:58,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 22:53:58,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 22:53:58,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 22:53:58,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 22:53:58,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c68831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58, skipping insertion in model container [2022-01-31 22:53:58,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 22:53:58,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 22:53:58,693 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/interpolation.c[449,462] [2022-01-31 22:53:58,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:53:58,735 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 22:53:58,746 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/interpolation.c[449,462] [2022-01-31 22:53:58,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:53:58,766 INFO L208 MainTranslator]: Completed translation [2022-01-31 22:53:58,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58 WrapperNode [2022-01-31 22:53:58,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 22:53:58,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 22:53:58,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 22:53:58,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 22:53:58,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 22:53:58,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 22:53:58,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 22:53:58,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 22:53:58,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (1/1) ... [2022-01-31 22:53:58,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:53:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 22:53:58,830 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 22:53:58,851 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 22:53:58,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 22:53:58,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 22:53:58,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 22:53:58,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 22:53:58,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 22:53:58,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 22:53:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 22:53:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 22:53:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 22:53:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 22:53:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2022-01-31 22:53:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 22:53:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 22:53:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 22:53:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 22:53:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 22:53:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-01-31 22:53:58,931 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 22:53:58,932 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 22:53:59,007 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 22:53:59,012 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 22:53:59,012 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 22:53:59,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:53:59 BoogieIcfgContainer [2022-01-31 22:53:59,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 22:53:59,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 22:53:59,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 22:53:59,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 22:53:59,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:53:58" (1/3) ... [2022-01-31 22:53:59,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630c4f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:53:59, skipping insertion in model container [2022-01-31 22:53:59,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:53:58" (2/3) ... [2022-01-31 22:53:59,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630c4f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:53:59, skipping insertion in model container [2022-01-31 22:53:59,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:53:59" (3/3) ... [2022-01-31 22:53:59,022 INFO L111 eAbstractionObserver]: Analyzing ICFG interpolation.c [2022-01-31 22:53:59,026 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 22:53:59,026 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 22:53:59,068 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 22:53:59,073 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 22:53:59,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 22:53:59,087 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 22:53:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 22:53:59,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:59,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:59,099 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1453585219, now seen corresponding path program 1 times [2022-01-31 22:53:59,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:59,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140668185] [2022-01-31 22:53:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:59,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:59,159 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:59,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:59,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 22:53:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:59,275 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 22:53:59,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:59,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140668185] [2022-01-31 22:53:59,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1140668185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:59,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:59,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 22:53:59,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739705703] [2022-01-31 22:53:59,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:59,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 22:53:59,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 22:53:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 22:53:59,311 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 22:53:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:59,372 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-01-31 22:53:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 22:53:59,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 19 [2022-01-31 22:53:59,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:59,377 INFO L225 Difference]: With dead ends: 48 [2022-01-31 22:53:59,378 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 22:53:59,379 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 22:53:59,382 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 22:53:59,382 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 22:53:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 22:53:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-31 22:53:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 22:53:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 22:53:59,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-01-31 22:53:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:59,403 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 22:53:59,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 22:53:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 22:53:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 22:53:59,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:59,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 22:53:59,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 22:53:59,404 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2133434406, now seen corresponding path program 1 times [2022-01-31 22:53:59,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:59,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713265953] [2022-01-31 22:53:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:59,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:59,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:59,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:53:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 22:53:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:53:59,467 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 22:53:59,467 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:53:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713265953] [2022-01-31 22:53:59,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1713265953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:53:59,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:53:59,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 22:53:59,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991522297] [2022-01-31 22:53:59,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:53:59,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 22:53:59,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:53:59,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 22:53:59,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 22:53:59,469 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 22:53:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:53:59,517 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-01-31 22:53:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 22:53:59,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-31 22:53:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:53:59,519 INFO L225 Difference]: With dead ends: 33 [2022-01-31 22:53:59,519 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 22:53:59,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 22:53:59,520 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:53:59,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:53:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 22:53:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-01-31 22:53:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 22:53:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-31 22:53:59,527 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2022-01-31 22:53:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:53:59,528 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-31 22:53:59,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 22:53:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-31 22:53:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 22:53:59,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:53:59,529 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 22:53:59,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 22:53:59,529 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:53:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:53:59,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1056969069, now seen corresponding path program 1 times [2022-01-31 22:53:59,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:53:59,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381725453] [2022-01-31 22:53:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:53:59,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:53:59,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:53:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:53:59,553 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 22:53:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:53:59,583 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 22:53:59,584 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 22:53:59,585 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 22:53:59,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 22:53:59,589 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-31 22:53:59,602 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 22:53:59,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:53:59 BoogieIcfgContainer [2022-01-31 22:53:59,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 22:53:59,610 INFO L158 Benchmark]: Toolchain (without parser) took 1035.50ms. Allocated memory is still 195.0MB. Free memory was 146.3MB in the beginning and 171.5MB in the end (delta: -25.1MB). Peak memory consumption was 29.1MB. Max. memory is 8.0GB. [2022-01-31 22:53:59,611 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 195.0MB. Free memory was 162.9MB in the beginning and 162.9MB in the end (delta: 80.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 22:53:59,611 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.71ms. Allocated memory is still 195.0MB. Free memory was 146.2MB in the beginning and 171.4MB in the end (delta: -25.2MB). Peak memory consumption was 13.5MB. Max. memory is 8.0GB. [2022-01-31 22:53:59,612 INFO L158 Benchmark]: Boogie Preprocessor took 40.58ms. Allocated memory is still 195.0MB. Free memory was 171.4MB in the beginning and 169.5MB in the end (delta: 1.9MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 22:53:59,613 INFO L158 Benchmark]: RCFGBuilder took 204.77ms. Allocated memory is still 195.0MB. Free memory was 169.5MB in the beginning and 158.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 22:53:59,613 INFO L158 Benchmark]: TraceAbstraction took 596.00ms. Allocated memory is still 195.0MB. Free memory was 158.0MB in the beginning and 171.5MB in the end (delta: -13.5MB). Peak memory consumption was 40.8MB. Max. memory is 8.0GB. [2022-01-31 22:53:59,614 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 195.0MB. Free memory was 162.9MB in the beginning and 162.9MB in the end (delta: 80.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.71ms. Allocated memory is still 195.0MB. Free memory was 146.2MB in the beginning and 171.4MB in the end (delta: -25.2MB). Peak memory consumption was 13.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.58ms. Allocated memory is still 195.0MB. Free memory was 171.4MB in the beginning and 169.5MB in the end (delta: 1.9MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 204.77ms. Allocated memory is still 195.0MB. Free memory was 169.5MB in the beginning and 158.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 596.00ms. Allocated memory is still 195.0MB. Free memory was 158.0MB in the beginning and 171.5MB in the end (delta: -13.5MB). Peak memory consumption was 40.8MB. 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: 9]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 26, overapproximation of to_real at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 24. Possible FailurePath: [L13] int i; [L14] float z, t; [L15] float min[] = { 5, 10, 12, 30, 150 }; [L16] float max[] = { 10, 12, 30, 150, 300 }; [L18] t = __VERIFIER_nondet_float() [L19] EXPR min[0] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR max[sizeof(max) / sizeof(max[0]) - 1] [L19] EXPR t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1] [L19] CALL assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L7] COND FALSE !(!cond) [L19] RET assume_abort_if_not(t >= min[0] && t <= max[sizeof(max) / sizeof(max[0]) - 1]) [L21] i = 0 [L21] COND TRUE i < sizeof(min) / sizeof(min[0]) [L22] EXPR max[i] [L22] COND TRUE t <= max[i] [L24] EXPR min[i] [L24] EXPR max[i] [L24] EXPR min[i] [L24] z = (t - min[i]) / (max[i] - min[i]) [L26] CALL __VERIFIER_assert(z >= 0.f && z <= 1.f) [L9] COND TRUE !(cond) [L9] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, 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, 47 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 60 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26 IncrementalHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 50 mSDtfsCounter, 26 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 7, 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, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 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 22:53:59,641 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...