/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 11:33:29,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 11:33:29,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 11:33:29,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-10-16 11:33:30,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 11:33:30,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 11:33:30,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 11:33:30,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 11:33:30,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 11:33:30,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 11:33:30,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 11:33:30,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 11:33:30,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 11:33:30,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 11:33:30,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 11:33:30,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 11:33:30,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 11:33:30,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 11:33:30,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 11:33:30,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 11:33:30,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf [2022-10-16 11:33:30,145 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 11:33:30,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 11:33:30,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 11:33:30,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 11:33:30,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 11:33:30,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 11:33:30,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 11:33:30,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 11:33:30,152 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 11:33:30,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 11:33:30,153 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 11:33:30,154 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 11:33:30,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 11:33:30,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 11:33:30,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 11:33:30,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-16 11:33:30,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 11:33:30,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-16 11:33:30,155 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-10-16 11:33:30,155 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 11:33:30,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-16 11:33:30,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 11:33:30,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-16 11:33:30,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 11:33:30,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 11:33:30,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 11:33:30,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 11:33:30,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 11:33:30,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 11:33:30,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-16 11:33:30,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 11:33:30,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 11:33:30,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-16 11:33:30,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 11:33:30,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 11:33:30,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 11:33:30,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 11:33:30,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 11:33:30,650 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 11:33:30,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-10-16 11:33:30,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53882022b/f6d09c7eee744c63a830e4f386c168e0/FLAG98f9d8774 [2022-10-16 11:33:31,476 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 11:33:31,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2022-10-16 11:33:31,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53882022b/f6d09c7eee744c63a830e4f386c168e0/FLAG98f9d8774 [2022-10-16 11:33:31,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53882022b/f6d09c7eee744c63a830e4f386c168e0 [2022-10-16 11:33:31,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 11:33:31,841 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 11:33:31,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 11:33:31,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 11:33:31,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 11:33:31,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:33:31" (1/1) ... [2022-10-16 11:33:31,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b5c143a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:31, skipping insertion in model container [2022-10-16 11:33:31,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:33:31" (1/1) ... [2022-10-16 11:33:31,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 11:33:31,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 11:33:32,037 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-10-16 11:33:32,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 11:33:32,047 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 11:33:32,064 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2022-10-16 11:33:32,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 11:33:32,079 INFO L208 MainTranslator]: Completed translation [2022-10-16 11:33:32,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32 WrapperNode [2022-10-16 11:33:32,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 11:33:32,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 11:33:32,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 11:33:32,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 11:33:32,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,116 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-10-16 11:33:32,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 11:33:32,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 11:33:32,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 11:33:32,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 11:33:32,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,136 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 11:33:32,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 11:33:32,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 11:33:32,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 11:33:32,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (1/1) ... [2022-10-16 11:33:32,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 11:33:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 11:33:32,174 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) [2022-10-16 11:33:32,189 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 [2022-10-16 11:33:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 11:33:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-10-16 11:33:32,234 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-10-16 11:33:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 11:33:32,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 11:33:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 11:33:32,330 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 11:33:32,332 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 11:33:32,536 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 11:33:32,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 11:33:32,545 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-16 11:33:32,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:33:32 BoogieIcfgContainer [2022-10-16 11:33:32,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 11:33:32,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 11:33:32,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 11:33:32,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 11:33:32,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:33:31" (1/3) ... [2022-10-16 11:33:32,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4f8815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:33:32, skipping insertion in model container [2022-10-16 11:33:32,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:33:32" (2/3) ... [2022-10-16 11:33:32,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4f8815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:33:32, skipping insertion in model container [2022-10-16 11:33:32,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:33:32" (3/3) ... [2022-10-16 11:33:32,563 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2022-10-16 11:33:32,592 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 11:33:32,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-10-16 11:33:32,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 11:33:32,702 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41045b16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 11:33:32,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-16 11:33:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 11:33:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 11:33:32,736 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 11:33:32,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 11:33:32,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-10-16 11:33:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 11:33:32,747 INFO L85 PathProgramCache]: Analyzing trace with hash -72381435, now seen corresponding path program 1 times [2022-10-16 11:33:32,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 11:33:32,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205037100] [2022-10-16 11:33:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 11:33:32,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 11:33:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 11:33:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 11:33:33,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 11:33:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205037100] [2022-10-16 11:33:33,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205037100] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 11:33:33,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 11:33:33,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 11:33:33,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044755976] [2022-10-16 11:33:33,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 11:33:33,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 11:33:33,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 11:33:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 11:33:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 11:33:33,272 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 11:33:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 11:33:33,368 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-10-16 11:33:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 11:33:33,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 11:33:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 11:33:33,396 INFO L225 Difference]: With dead ends: 28 [2022-10-16 11:33:33,396 INFO L226 Difference]: Without dead ends: 19 [2022-10-16 11:33:33,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 11:33:33,415 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 11:33:33,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 11:33:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-10-16 11:33:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-10-16 11:33:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 11:33:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-10-16 11:33:33,499 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 7 [2022-10-16 11:33:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 11:33:33,500 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-10-16 11:33:33,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 11:33:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-10-16 11:33:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-16 11:33:33,504 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 11:33:33,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 11:33:33,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 11:33:33,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-10-16 11:33:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 11:33:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2051142849, now seen corresponding path program 1 times [2022-10-16 11:33:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 11:33:33,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142410892] [2022-10-16 11:33:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 11:33:33,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 11:33:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 11:33:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 11:33:33,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 11:33:33,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142410892] [2022-10-16 11:33:33,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142410892] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 11:33:33,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 11:33:33,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 11:33:33,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473818425] [2022-10-16 11:33:33,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 11:33:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 11:33:33,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 11:33:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 11:33:33,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 11:33:33,666 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 11:33:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 11:33:33,738 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-10-16 11:33:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 11:33:33,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-16 11:33:33,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 11:33:33,742 INFO L225 Difference]: With dead ends: 30 [2022-10-16 11:33:33,742 INFO L226 Difference]: Without dead ends: 29 [2022-10-16 11:33:33,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 11:33:33,747 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 11:33:33,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 11:33:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-16 11:33:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-10-16 11:33:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-16 11:33:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-10-16 11:33:33,775 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2022-10-16 11:33:33,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 11:33:33,776 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-10-16 11:33:33,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 11:33:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-10-16 11:33:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-16 11:33:33,779 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 11:33:33,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 11:33:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 11:33:33,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-10-16 11:33:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 11:33:33,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1074035829, now seen corresponding path program 1 times [2022-10-16 11:33:33,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 11:33:33,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279018891] [2022-10-16 11:33:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 11:33:33,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 11:33:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-16 11:33:33,833 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-16 11:33:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-16 11:33:33,869 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-16 11:33:33,869 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-16 11:33:33,871 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 4 remaining) [2022-10-16 11:33:33,873 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 4 remaining) [2022-10-16 11:33:33,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 4 remaining) [2022-10-16 11:33:33,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 4 remaining) [2022-10-16 11:33:33,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 11:33:33,881 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-16 11:33:33,887 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-16 11:33:33,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:33:33 BoogieIcfgContainer [2022-10-16 11:33:33,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-16 11:33:33,920 INFO L158 Benchmark]: Toolchain (without parser) took 2082.71ms. Allocated memory is still 153.1MB. Free memory was 128.5MB in the beginning and 107.1MB in the end (delta: 21.3MB). Peak memory consumption was 21.7MB. Max. memory is 8.0GB. [2022-10-16 11:33:33,920 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 153.1MB. Free memory is still 122.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-10-16 11:33:33,921 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.85ms. Allocated memory is still 153.1MB. Free memory was 128.2MB in the beginning and 118.7MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-10-16 11:33:33,922 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.90ms. Allocated memory is still 153.1MB. Free memory was 118.7MB in the beginning and 117.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-16 11:33:33,922 INFO L158 Benchmark]: Boogie Preprocessor took 21.56ms. Allocated memory is still 153.1MB. Free memory was 117.3MB in the beginning and 116.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-16 11:33:33,923 INFO L158 Benchmark]: RCFGBuilder took 409.27ms. Allocated memory is still 153.1MB. Free memory was 116.2MB in the beginning and 106.4MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-10-16 11:33:33,924 INFO L158 Benchmark]: TraceAbstraction took 1366.42ms. Allocated memory is still 153.1MB. Free memory was 105.6MB in the beginning and 107.1MB in the end (delta: -1.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-10-16 11:33:33,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 153.1MB. Free memory is still 122.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 237.85ms. Allocated memory is still 153.1MB. Free memory was 128.2MB in the beginning and 118.7MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.90ms. Allocated memory is still 153.1MB. Free memory was 118.7MB in the beginning and 117.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.56ms. Allocated memory is still 153.1MB. Free memory was 117.3MB in the beginning and 116.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 409.27ms. Allocated memory is still 153.1MB. Free memory was 116.2MB in the beginning and 106.4MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1366.42ms. Allocated memory is still 153.1MB. Free memory was 105.6MB in the beginning and 107.1MB in the end (delta: -1.6MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=1] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L31] unsigned result = hanoi(n); [L33] result+1>0 && result+1 == 1<0 && result+1 == 1<0 && result+1 == 1<