/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/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:11:45,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:11:45,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:11:45,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:11:45,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 01:11:45,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 01:11:45,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 01:11:45,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 01:11:45,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 01:11:45,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 01:11:45,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 01:11:45,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 01:11:45,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 01:11:45,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 01:11:45,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 01:11:45,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 01:11:45,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-15 01:11:45,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:11:45,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:11:45,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:11:45,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:11:45,223 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:11:45,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:11:45,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:11:45,225 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:11:45,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:11:45,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:11:45,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:11:45,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:11:45,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:11:45,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:11:45,226 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:11:45,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:11:45,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:11:45,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:11:45,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:11:45,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:11:45,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:11:45,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:11:45,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:45,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:11:45,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:11:45,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:11:45,227 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:11:45,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:11:45,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:11:45,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:11:45,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:11:45,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:11:45,431 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:11:45,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2022-02-15 01:11:45,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca1bc948/aa12542096774203b86d05f1c525baeb/FLAGd034ee1d5 [2022-02-15 01:11:45,786 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:11:45,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2022-02-15 01:11:45,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca1bc948/aa12542096774203b86d05f1c525baeb/FLAGd034ee1d5 [2022-02-15 01:11:46,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca1bc948/aa12542096774203b86d05f1c525baeb [2022-02-15 01:11:46,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:11:46,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:11:46,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:46,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:11:46,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:11:46,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@537912b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46, skipping insertion in model container [2022-02-15 01:11:46,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:11:46,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:11:46,362 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2022-02-15 01:11:46,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:46,387 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:11:46,395 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c[352,365] [2022-02-15 01:11:46,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:11:46,412 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:11:46,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46 WrapperNode [2022-02-15 01:11:46,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:11:46,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:11:46,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:11:46,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:11:46,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:11:46,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:11:46,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:11:46,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:11:46,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (1/1) ... [2022-02-15 01:11:46,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:11:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:11:46,474 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) [2022-02-15 01:11:46,480 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 [2022-02-15 01:11:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:11:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:11:46,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:11:46,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:11:46,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:11:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:11:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:11:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:11:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:11:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:11:46,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:11:46,547 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:11:46,548 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:11:46,640 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:11:46,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:11:46,645 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 01:11:46,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:46 BoogieIcfgContainer [2022-02-15 01:11:46,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:11:46,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:11:46,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:11:46,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:11:46,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:11:46" (1/3) ... [2022-02-15 01:11:46,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3619c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:46, skipping insertion in model container [2022-02-15 01:11:46,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:11:46" (2/3) ... [2022-02-15 01:11:46,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3619c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:11:46, skipping insertion in model container [2022-02-15 01:11:46,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:11:46" (3/3) ... [2022-02-15 01:11:46,663 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2022-02-15 01:11:46,667 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:11:46,667 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:11:46,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:11:46,703 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 [2022-02-15 01:11:46,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:11:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:11:46,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:46,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:46,719 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1739069180, now seen corresponding path program 1 times [2022-02-15 01:11:46,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:46,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771795826] [2022-02-15 01:11:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:46,787 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:46,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:46,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771795826] [2022-02-15 01:11:46,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771795826] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:46,930 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:46,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:11:46,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412781913] [2022-02-15 01:11:46,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:46,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:11:46,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:46,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:11:46,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:11:46,960 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,007 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-02-15 01:11:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:11:47,010 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 01:11:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,017 INFO L225 Difference]: With dead ends: 51 [2022-02-15 01:11:47,017 INFO L226 Difference]: Without dead ends: 24 [2022-02-15 01:11:47,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:11:47,023 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:47,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-15 01:11:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-15 01:11:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-15 01:11:47,061 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-02-15 01:11:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,061 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-15 01:11:47,062 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-15 01:11:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:11:47,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:47,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:11:47,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,065 INFO L85 PathProgramCache]: Analyzing trace with hash 186732794, now seen corresponding path program 1 times [2022-02-15 01:11:47,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551947303] [2022-02-15 01:11:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,071 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,138 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551947303] [2022-02-15 01:11:47,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [551947303] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:11:47,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743453691] [2022-02-15 01:11:47,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:11:47,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:11:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:11:47,141 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,258 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-02-15 01:11:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:11:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 01:11:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,260 INFO L225 Difference]: With dead ends: 44 [2022-02-15 01:11:47,260 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:11:47,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:47,262 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:11:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-02-15 01:11:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-02-15 01:11:47,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2022-02-15 01:11:47,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,270 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-02-15 01:11:47,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-02-15 01:11:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:11:47,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:47,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:11:47,271 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,285 INFO L85 PathProgramCache]: Analyzing trace with hash -848440424, now seen corresponding path program 1 times [2022-02-15 01:11:47,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138437020] [2022-02-15 01:11:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,296 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,296 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,297 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138437020] [2022-02-15 01:11:47,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [138437020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:11:47,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596441578] [2022-02-15 01:11:47,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:11:47,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:11:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:11:47,423 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:47,499 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-02-15 01:11:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:11:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:11:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:47,501 INFO L225 Difference]: With dead ends: 37 [2022-02-15 01:11:47,501 INFO L226 Difference]: Without dead ends: 26 [2022-02-15 01:11:47,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:47,503 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:47,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:11:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-15 01:11:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-15 01:11:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-02-15 01:11:47,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2022-02-15 01:11:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:47,513 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-02-15 01:11:47,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-02-15 01:11:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 01:11:47,513 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:47,514 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] [2022-02-15 01:11:47,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:11:47,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:47,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:47,514 INFO L85 PathProgramCache]: Analyzing trace with hash 689124982, now seen corresponding path program 1 times [2022-02-15 01:11:47,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:47,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928662251] [2022-02-15 01:11:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:47,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:47,516 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:47,518 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:47,896 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:47,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928662251] [2022-02-15 01:11:47,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928662251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:47,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:47,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:11:47,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798297114] [2022-02-15 01:11:47,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:47,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:11:47,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:47,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:11:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:11:47,898 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,287 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-02-15 01:11:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:11:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-15 01:11:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,288 INFO L225 Difference]: With dead ends: 50 [2022-02-15 01:11:48,288 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 01:11:48,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:11:48,290 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 61 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 01:11:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-02-15 01:11:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-02-15 01:11:48,299 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 21 [2022-02-15 01:11:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,299 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-02-15 01:11:48,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-02-15 01:11:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:11:48,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:48,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:11:48,301 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 369179156, now seen corresponding path program 2 times [2022-02-15 01:11:48,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854491361] [2022-02-15 01:11:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,304 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,305 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:48,359 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:48,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854491361] [2022-02-15 01:11:48,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1854491361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:48,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:48,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:11:48,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802370948] [2022-02-15 01:11:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:48,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:11:48,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:11:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:11:48,361 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:48,476 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-02-15 01:11:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:11:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 01:11:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:48,479 INFO L225 Difference]: With dead ends: 59 [2022-02-15 01:11:48,481 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 01:11:48,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:48,491 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:48,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 01:11:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-02-15 01:11:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-02-15 01:11:48,499 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2022-02-15 01:11:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:48,499 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-02-15 01:11:48,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-02-15 01:11:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:11:48,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:48,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:48,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:11:48,500 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:48,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1704530446, now seen corresponding path program 3 times [2022-02-15 01:11:48,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:48,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68332212] [2022-02-15 01:11:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:48,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:48,503 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:48,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:48,510 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:48,836 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:48,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68332212] [2022-02-15 01:11:48,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [68332212] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:48,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:48,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:11:48,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191939696] [2022-02-15 01:11:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:48,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:11:48,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:11:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:11:48,838 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,396 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2022-02-15 01:11:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:11:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 01:11:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,398 INFO L225 Difference]: With dead ends: 70 [2022-02-15 01:11:49,398 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:11:49,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:11:49,400 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 74 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:11:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2022-02-15 01:11:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-02-15 01:11:49,408 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 25 [2022-02-15 01:11:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,408 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-02-15 01:11:49,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-02-15 01:11:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 01:11:49,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,409 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:11:49,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1823608176, now seen corresponding path program 4 times [2022-02-15 01:11:49,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371180291] [2022-02-15 01:11:49,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,412 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,413 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,461 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371180291] [2022-02-15 01:11:49,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371180291] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:49,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773997602] [2022-02-15 01:11:49,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:49,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:49,462 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,615 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-02-15 01:11:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:11:49,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 01:11:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,616 INFO L225 Difference]: With dead ends: 74 [2022-02-15 01:11:49,616 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 01:11:49,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:11:49,617 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 46 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 01:11:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2022-02-15 01:11:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-02-15 01:11:49,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2022-02-15 01:11:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,625 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-02-15 01:11:49,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-02-15 01:11:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:11:49,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:11:49,626 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,626 INFO L85 PathProgramCache]: Analyzing trace with hash 463472720, now seen corresponding path program 1 times [2022-02-15 01:11:49,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527920853] [2022-02-15 01:11:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,628 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,628 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,629 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-15 01:11:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:49,673 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:49,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527920853] [2022-02-15 01:11:49,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527920853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:49,674 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:49,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:11:49,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709702876] [2022-02-15 01:11:49,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:49,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:11:49,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:11:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:11:49,675 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:49,785 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-02-15 01:11:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:11:49,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-02-15 01:11:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:49,786 INFO L225 Difference]: With dead ends: 75 [2022-02-15 01:11:49,786 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 01:11:49,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:11:49,787 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:49,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 37 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 01:11:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2022-02-15 01:11:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-02-15 01:11:49,794 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2022-02-15 01:11:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:49,794 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-02-15 01:11:49,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:11:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-02-15 01:11:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:11:49,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:49,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:49,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:11:49,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:49,795 INFO L85 PathProgramCache]: Analyzing trace with hash -144214162, now seen corresponding path program 5 times [2022-02-15 01:11:49,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:49,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279094789] [2022-02-15 01:11:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:49,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:49,797 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:49,798 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:50,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:50,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279094789] [2022-02-15 01:11:50,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [279094789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:50,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:50,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:11:50,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197932470] [2022-02-15 01:11:50,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:11:50,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:11:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:11:50,101 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:50,840 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-02-15 01:11:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:11:50,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:11:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:50,841 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:11:50,841 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:11:50,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:11:50,842 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:50,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 76 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:11:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:11:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2022-02-15 01:11:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-02-15 01:11:50,851 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 29 [2022-02-15 01:11:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:50,851 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-02-15 01:11:50,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-02-15 01:11:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:11:50,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:50,852 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:50,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:11:50,852 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:50,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:50,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1709112588, now seen corresponding path program 6 times [2022-02-15 01:11:50,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:50,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096982053] [2022-02-15 01:11:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:50,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:50,854 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:50,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:50,855 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:11:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:11:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:11:50,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:11:50,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096982053] [2022-02-15 01:11:50,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096982053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:11:50,919 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:11:50,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:11:50,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010095339] [2022-02-15 01:11:50,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:11:50,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:11:50,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:11:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:11:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:11:50,920 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:11:51,117 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-02-15 01:11:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:11:51,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 01:11:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:11:51,118 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:11:51,118 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 01:11:51,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:11:51,119 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:11:51,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 44 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:11:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 01:11:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-02-15 01:11:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:11:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-02-15 01:11:51,127 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 31 [2022-02-15 01:11:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:11:51,128 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-02-15 01:11:51,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:11:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-02-15 01:11:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:11:51,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:11:51,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:11:51,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:11:51,129 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:11:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:11:51,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1181909964, now seen corresponding path program 2 times [2022-02-15 01:11:51,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:11:51,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041851686] [2022-02-15 01:11:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:11:51,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:11:51,130 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:11:51,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:11:51,131 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:11:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:11:51,147 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-15 01:11:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-15 01:11:51,174 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-15 01:11:51,174 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-15 01:11:51,176 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:11:51,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:11:51,179 INFO L732 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1] [2022-02-15 01:11:51,181 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 01:11:51,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:11:51 BoogieIcfgContainer [2022-02-15 01:11:51,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 01:11:51,189 INFO L158 Benchmark]: Toolchain (without parser) took 4977.38ms. Allocated memory was 173.0MB in the beginning and 254.8MB in the end (delta: 81.8MB). Free memory was 121.1MB in the beginning and 122.8MB in the end (delta: -1.7MB). Peak memory consumption was 81.4MB. Max. memory is 8.0GB. [2022-02-15 01:11:51,190 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 173.0MB. Free memory is still 137.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 01:11:51,190 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.80ms. Allocated memory is still 173.0MB. Free memory was 120.9MB in the beginning and 145.7MB in the end (delta: -24.8MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-02-15 01:11:51,190 INFO L158 Benchmark]: Boogie Preprocessor took 29.40ms. Allocated memory is still 173.0MB. Free memory was 145.7MB in the beginning and 144.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 01:11:51,190 INFO L158 Benchmark]: RCFGBuilder took 203.13ms. Allocated memory is still 173.0MB. Free memory was 144.0MB in the beginning and 132.9MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-15 01:11:51,190 INFO L158 Benchmark]: TraceAbstraction took 4541.47ms. Allocated memory was 173.0MB in the beginning and 254.8MB in the end (delta: 81.8MB). Free memory was 132.5MB in the beginning and 122.8MB in the end (delta: 9.7MB). Peak memory consumption was 93.0MB. Max. memory is 8.0GB. [2022-02-15 01:11:51,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 173.0MB. Free memory is still 137.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.80ms. Allocated memory is still 173.0MB. Free memory was 120.9MB in the beginning and 145.7MB in the end (delta: -24.8MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.40ms. Allocated memory is still 173.0MB. Free memory was 145.7MB in the beginning and 144.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 203.13ms. Allocated memory is still 173.0MB. Free memory was 144.0MB in the beginning and 132.9MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 4541.47ms. Allocated memory was 173.0MB in the beginning and 254.8MB in the end (delta: 81.8MB). Free memory was 132.5MB in the beginning and 122.8MB in the end (delta: 9.7MB). Peak memory consumption was 93.0MB. 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 [L35] COND TRUE i