/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:19:08,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:19:08,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:19:08,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:19:08,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:19:08,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:19:08,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:19:08,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:19:08,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:19:08,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:19:08,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:19:08,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:19:08,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:19:08,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:19:08,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:19:08,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:19:08,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:19:08,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:19:08,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:19:08,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:19:08,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:19:08,235 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:19:08,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:19:08,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:19:08,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:19:08,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:19:08,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:19:08,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:19:08,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:19:08,238 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:19:08,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:19:08,239 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:19:08,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:19:08,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:19:08,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:19:08,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:19:08,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:19:08,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:19:08,240 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:19:08,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:19:08,240 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:19:08,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:19:08,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:19:08,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:19:08,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:19:08,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:19:08,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:19:08,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:19:08,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:19:08,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:19:08,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:19:08,241 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:19:08,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:19:08,242 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:19:08,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:19:08,242 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:19:08,242 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:19:08,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:19:08,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:19:08,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:19:08,512 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:19:08,512 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:19:08,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2023-03-31 00:19:09,706 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:19:09,899 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:19:09,900 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2023-03-31 00:19:09,904 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ef021a9/e56d12ea75bd4d0abdcf65e447d5a39e/FLAGbf90421e5 [2023-03-31 00:19:09,920 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ef021a9/e56d12ea75bd4d0abdcf65e447d5a39e [2023-03-31 00:19:09,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:19:09,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:19:09,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:19:09,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:19:09,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:19:09,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:19:09" (1/1) ... [2023-03-31 00:19:09,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e1aaa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:09, skipping insertion in model container [2023-03-31 00:19:09,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:19:09" (1/1) ... [2023-03-31 00:19:09,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:19:09,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:19:10,057 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2023-03-31 00:19:10,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:19:10,074 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:19:10,083 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2023-03-31 00:19:10,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:19:10,095 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:19:10,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10 WrapperNode [2023-03-31 00:19:10,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:19:10,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:19:10,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:19:10,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:19:10,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,114 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:19:10,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:19:10,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:19:10,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:19:10,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (1/1) ... [2023-03-31 00:19:10,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:19:10,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:19:10,156 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) [2023-03-31 00:19:10,164 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 [2023-03-31 00:19:10,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:19:10,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:19:10,189 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:19:10,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:19:10,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:19:10,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:19:10,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:19:10,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:19:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:19:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:19:10,240 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:19:10,241 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:19:10,315 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:19:10,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:19:10,321 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 00:19:10,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:19:10 BoogieIcfgContainer [2023-03-31 00:19:10,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:19:10,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:19:10,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:19:10,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:19:10,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:19:09" (1/3) ... [2023-03-31 00:19:10,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dca6e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:19:10, skipping insertion in model container [2023-03-31 00:19:10,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:19:10" (2/3) ... [2023-03-31 00:19:10,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dca6e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:19:10, skipping insertion in model container [2023-03-31 00:19:10,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:19:10" (3/3) ... [2023-03-31 00:19:10,330 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2023-03-31 00:19:10,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:19:10,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:19:10,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:19:10,409 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1a084d82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:19:10,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:19:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2023-03-31 00:19:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 00:19:10,417 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:19:10,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:19:10,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:19:10,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:19:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2023-03-31 00:19:10,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:19:10,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072320890] [2023-03-31 00:19:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:19:10,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:19:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:10,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:19:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:10,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:19:10,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072320890] [2023-03-31 00:19:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072320890] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:19:10,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:19:10,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 00:19:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269180050] [2023-03-31 00:19:10,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:19:10,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 00:19:10,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:19:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 00:19:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 00:19:10,620 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 00:19:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:19:10,741 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-03-31 00:19:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 00:19:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-03-31 00:19:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:19:10,748 INFO L225 Difference]: With dead ends: 29 [2023-03-31 00:19:10,748 INFO L226 Difference]: Without dead ends: 12 [2023-03-31 00:19:10,750 INFO L412 NwaCegarLoop]: 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 [2023-03-31 00:19:10,753 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:19:10,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:19:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-03-31 00:19:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-03-31 00:19:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 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) [2023-03-31 00:19:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-03-31 00:19:10,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2023-03-31 00:19:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:19:10,782 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-03-31 00:19:10,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 00:19:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-03-31 00:19:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 00:19:10,783 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:19:10,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:19:10,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 00:19:10,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:19:10,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:19:10,784 INFO L85 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2023-03-31 00:19:10,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:19:10,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853262783] [2023-03-31 00:19:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:19:10,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:19:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:10,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:19:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:10,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:19:10,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853262783] [2023-03-31 00:19:10,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853262783] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:19:10,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:19:10,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:19:10,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172102687] [2023-03-31 00:19:10,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:19:10,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:19:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:19:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:19:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:19:10,900 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-03-31 00:19:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:19:10,937 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2023-03-31 00:19:10,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:19:10,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-03-31 00:19:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:19:10,939 INFO L225 Difference]: With dead ends: 18 [2023-03-31 00:19:10,939 INFO L226 Difference]: Without dead ends: 13 [2023-03-31 00:19:10,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:19:10,940 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:19:10,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:19:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-03-31 00:19:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-03-31 00:19:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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) [2023-03-31 00:19:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-03-31 00:19:10,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2023-03-31 00:19:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:19:10,947 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-03-31 00:19:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-03-31 00:19:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-03-31 00:19:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 00:19:10,948 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:19:10,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:19:10,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:19:10,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:19:10,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:19:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2023-03-31 00:19:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:19:10,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215298737] [2023-03-31 00:19:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:19:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:19:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:11,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:19:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:11,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:19:11,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215298737] [2023-03-31 00:19:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215298737] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:19:11,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190941532] [2023-03-31 00:19:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:19:11,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:19:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:19:11,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:19:11,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:19:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:11,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:19:11,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:19:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:11,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:19:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:11,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190941532] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:19:11,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:19:11,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-31 00:19:11,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078956430] [2023-03-31 00:19:11,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:19:11,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:19:11,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:19:11,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:19:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:19:11,275 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:19:11,385 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-03-31 00:19:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:19:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 00:19:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:19:11,386 INFO L225 Difference]: With dead ends: 21 [2023-03-31 00:19:11,387 INFO L226 Difference]: Without dead ends: 16 [2023-03-31 00:19:11,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:19:11,392 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:19:11,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:19:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-03-31 00:19:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-03-31 00:19:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 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) [2023-03-31 00:19:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-03-31 00:19:11,403 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2023-03-31 00:19:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:19:11,404 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-03-31 00:19:11,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-03-31 00:19:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 00:19:11,405 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:19:11,405 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:19:11,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:19:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:19:11,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:19:11,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:19:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1105142364, now seen corresponding path program 2 times [2023-03-31 00:19:11,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:19:11,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495776737] [2023-03-31 00:19:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:19:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:19:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:19:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:11,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:19:11,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495776737] [2023-03-31 00:19:11,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495776737] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:19:11,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858451864] [2023-03-31 00:19:11,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:19:11,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:19:11,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:19:11,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:19:11,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:19:11,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:19:11,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:19:11,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 00:19:11,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:19:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:11,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:19:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:12,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858451864] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:19:12,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:19:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-03-31 00:19:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199741873] [2023-03-31 00:19:12,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:19:12,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:19:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:19:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:19:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:19:12,122 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:19:12,277 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-03-31 00:19:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:19:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 00:19:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:19:12,280 INFO L225 Difference]: With dead ends: 23 [2023-03-31 00:19:12,280 INFO L226 Difference]: Without dead ends: 18 [2023-03-31 00:19:12,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:19:12,284 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:19:12,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:19:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-03-31 00:19:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-03-31 00:19:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 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) [2023-03-31 00:19:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2023-03-31 00:19:12,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2023-03-31 00:19:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:19:12,297 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2023-03-31 00:19:12,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2023-03-31 00:19:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:19:12,299 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:19:12,299 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:19:12,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:19:12,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 00:19:12,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:19:12,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:19:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1943317092, now seen corresponding path program 3 times [2023-03-31 00:19:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:19:12,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69932136] [2023-03-31 00:19:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:19:12,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:19:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:12,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:19:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:12,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:19:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69932136] [2023-03-31 00:19:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69932136] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:19:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537373441] [2023-03-31 00:19:12,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:19:12,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:19:12,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:19:12,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:19:12,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:19:12,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 00:19:12,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:19:12,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 00:19:12,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:19:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:13,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:19:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:19:13,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537373441] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:19:13,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:19:13,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-03-31 00:19:13,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792286647] [2023-03-31 00:19:13,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:19:13,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 00:19:13,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:19:13,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 00:19:13,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2023-03-31 00:19:13,611 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:24,936 WARN L223 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 00:19:34,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 00:19:36,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-31 00:19:39,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-31 00:19:41,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-03-31 00:19:44,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-31 00:19:46,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-03-31 00:19:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:19:46,930 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2023-03-31 00:19:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-31 00:19:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 00:19:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:19:46,931 INFO L225 Difference]: With dead ends: 40 [2023-03-31 00:19:46,932 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 00:19:46,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=332, Invalid=1388, Unknown=2, NotChecked=0, Total=1722 [2023-03-31 00:19:46,934 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 17 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:19:46,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 62 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 158 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2023-03-31 00:19:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 00:19:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 00:19:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 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) [2023-03-31 00:19:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-03-31 00:19:46,946 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2023-03-31 00:19:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:19:46,946 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-03-31 00:19:46,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 20 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-03-31 00:19:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 00:19:46,948 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:19:46,948 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:19:46,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:19:47,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:19:47,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:19:47,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:19:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash -186252644, now seen corresponding path program 4 times [2023-03-31 00:19:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:19:47,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535234812] [2023-03-31 00:19:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:19:47,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:19:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:47,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:19:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:19:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 00:19:47,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:19:47,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535234812] [2023-03-31 00:19:47,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535234812] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:19:47,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385751505] [2023-03-31 00:19:47,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:19:47,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:19:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:19:47,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:19:47,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:19:47,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:19:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:19:47,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 00:19:47,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:19:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 00:19:47,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:19:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 00:19:47,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385751505] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:19:47,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 00:19:47,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-03-31 00:19:47,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802922663] [2023-03-31 00:19:47,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 00:19:47,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 00:19:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:19:47,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 00:19:47,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:19:47,641 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:19:47,757 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-03-31 00:19:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:19:47,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-03-31 00:19:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:19:47,757 INFO L225 Difference]: With dead ends: 26 [2023-03-31 00:19:47,757 INFO L226 Difference]: Without dead ends: 0 [2023-03-31 00:19:47,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2023-03-31 00:19:47,759 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:19:47,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 67 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:19:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-31 00:19:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-31 00:19:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-03-31 00:19:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-31 00:19:47,760 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2023-03-31 00:19:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:19:47,760 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-31 00:19:47,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:19:47,760 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-31 00:19:47,760 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-31 00:19:47,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 00:19:47,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:19:47,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:19:47,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-03-31 00:19:48,182 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2023-03-31 00:19:48,182 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2023-03-31 00:19:48,182 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 3) no Hoare annotation was computed. [2023-03-31 00:19:48,183 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-03-31 00:19:48,183 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-03-31 00:19:48,183 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-03-31 00:19:48,183 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-03-31 00:19:48,183 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-03-31 00:19:48,183 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-03-31 00:19:48,183 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 00:19:48,183 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 12 22) no Hoare annotation was computed. [2023-03-31 00:19:48,184 INFO L895 garLoopResultBuilder]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1)) (.cse4 (* 715827883 main_~y~0)) (.cse3 (+ (* main_~y~0 2) 1)) (.cse1 (* main_~y~0 178956971))) (or (and (<= .cse0 (* 3 (div (+ .cse1 178956968) 536870912))) (<= main_~y~0 8) (<= main_~x~0 3) (<= 3 main_~x~0)) (and (= main_~x~0 0) (= main_~y~0 1)) (let ((.cse2 (div main_~y~0 2))) (and (<= 6 main_~x~0) (<= .cse2 32) (= (mod main_~y~0 2) 0) (<= main_~x~0 6) (<= (+ .cse2 1) (* 3 (div (+ 715827872 (* 715827883 .cse2)) 2147483648))))) (and (<= main_~x~0 4) (<= main_~y~0 16) (<= .cse3 (* (div (+ .cse4 357913936) 1073741824) 3)) (<= 4 main_~x~0)) (and (<= main_~y~0 2) (<= .cse0 (* (div (+ (* 44739243 main_~y~0) 44739242) 134217728) 3)) (= main_~x~0 1)) (and (<= 5 main_~x~0) (<= .cse0 (* 3 (div (+ .cse4 715827872) 2147483648))) (<= main_~x~0 5) (<= main_~y~0 32)) (and (<= .cse3 (* (div (+ 89478484 .cse1) 268435456) 3)) (<= main_~y~0 4) (<= 2 main_~x~0) (<= main_~x~0 2)))) [2023-03-31 00:19:48,184 INFO L895 garLoopResultBuilder]: At program point L16-3(lines 16 19) the Hoare annotation is: (not (= (mod (mod main_~y~0 4294967296) 3) 0)) [2023-03-31 00:19:48,184 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 12 22) no Hoare annotation was computed. [2023-03-31 00:19:48,184 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 22) the Hoare annotation is: true [2023-03-31 00:19:48,184 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2023-03-31 00:19:48,184 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 5 10) the Hoare annotation is: true [2023-03-31 00:19:48,184 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-03-31 00:19:48,184 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2023-03-31 00:19:48,184 INFO L899 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2023-03-31 00:19:48,185 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2023-03-31 00:19:48,187 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-03-31 00:19:48,189 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 00:19:48,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 12:19:48 BoogieIcfgContainer [2023-03-31 00:19:48,218 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 00:19:48,218 INFO L158 Benchmark]: Toolchain (without parser) took 38295.27ms. Allocated memory is still 296.7MB. Free memory was 247.7MB in the beginning and 217.5MB in the end (delta: 30.2MB). Peak memory consumption was 31.0MB. Max. memory is 8.0GB. [2023-03-31 00:19:48,218 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 225.4MB. Free memory is still 175.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 00:19:48,218 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.35ms. Allocated memory is still 296.7MB. Free memory was 247.5MB in the beginning and 237.6MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-03-31 00:19:48,219 INFO L158 Benchmark]: Boogie Preprocessor took 19.48ms. Allocated memory is still 296.7MB. Free memory was 237.6MB in the beginning and 236.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 00:19:48,219 INFO L158 Benchmark]: RCFGBuilder took 205.68ms. Allocated memory is still 296.7MB. Free memory was 236.2MB in the beginning and 226.2MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-03-31 00:19:48,219 INFO L158 Benchmark]: TraceAbstraction took 37892.81ms. Allocated memory is still 296.7MB. Free memory was 225.4MB in the beginning and 217.5MB in the end (delta: 8.0MB). Peak memory consumption was 9.0MB. Max. memory is 8.0GB. [2023-03-31 00:19:48,220 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 225.4MB. Free memory is still 175.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 170.35ms. Allocated memory is still 296.7MB. Free memory was 247.5MB in the beginning and 237.6MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.48ms. Allocated memory is still 296.7MB. Free memory was 237.6MB in the beginning and 236.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 205.68ms. Allocated memory is still 296.7MB. Free memory was 236.2MB in the beginning and 226.2MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 37892.81ms. Allocated memory is still 296.7MB. Free memory was 225.4MB in the beginning and 217.5MB in the end (delta: 8.0MB). Peak memory consumption was 9.0MB. 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 37.8s, OverallIterations: 6, TraceHistogramMax: 14, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 33.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 105 SdHoareTripleChecker+Valid, 13.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 104 mSDsluCounter, 220 SdHoareTripleChecker+Invalid, 13.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 188 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 357 IncrementalHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 32 mSDtfsCounter, 357 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 218 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 21.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 19 PreInvPairs, 34 NumberOfFragments, 177 HoareAnnotationTreeSize, 19 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 400 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 215 ConstructedInterpolants, 2 QuantifiedInterpolants, 925 SizeOfPredicates, 3 NumberOfNonLiveVariables, 337 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 238/411 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((((((((y + 1 <= 3 * ((y * 178956971 + 178956968) / 536870912) && y <= 8) && x <= 3) && 3 <= x) || (x == 0 && y == 1)) || ((((6 <= x && y / 2 <= 32) && y % 2 == 0) && x <= 6) && y / 2 + 1 <= 3 * ((715827872 + 715827883 * (y / 2)) / 2147483648))) || (((x <= 4 && y <= 16) && y * 2 + 1 <= (715827883 * y + 357913936) / 1073741824 * 3) && 4 <= x)) || ((y <= 2 && y + 1 <= (44739243 * y + 44739242) / 134217728 * 3) && x == 1)) || (((5 <= x && y + 1 <= 3 * ((715827883 * y + 715827872) / 2147483648)) && x <= 5) && y <= 32)) || (((y * 2 + 1 <= (89478484 + y * 178956971) / 268435456 * 3 && y <= 4) && 2 <= x) && x <= 2) RESULT: Ultimate proved your program to be correct! [2023-03-31 00:19:48,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...