/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:03:26,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:03:26,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:03:26,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 01:03:26,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 01:03:26,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 01:03:26,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 01:03:26,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 01:03:26,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 01:03:26,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 01:03:26,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 01:03:26,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 01:03:26,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 01:03:26,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 01:03:26,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 01:03:26,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 01:03:26,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 01:03:26,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 01:03:26,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 01:03:26,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 01:03:26,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 01:03:26,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 01:03:26,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 01:03:26,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 01:03:26,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 01:03:26,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 01:03:26,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 01:03:26,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 01:03:26,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 01:03:26,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 01:03:26,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 01:03:26,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 01:03:26,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 01:03:26,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 01:03:26,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 01:03:26,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 01:03:26,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 01:03:26,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 01:03:26,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:03:26,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:03:26,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:03:26,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 01:03:26,145 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:03:26,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:03:26,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:03:26,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:03:26,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:03:26,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:03:26,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:03:26,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:03:26,147 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:03:26,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:03:26,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:03:26,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:03:26,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:03:26,149 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:03:26,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:03:26,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:03:26,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:03:26,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:03:26,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:03:26,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:03:26,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:03:26,330 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:03:26,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2022-01-10 01:03:26,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc94599e/930a293b36ca444392c2183e6d7d8fa6/FLAG96a61b11a [2022-01-10 01:03:26,677 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:03:26,677 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2022-01-10 01:03:26,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc94599e/930a293b36ca444392c2183e6d7d8fa6/FLAG96a61b11a [2022-01-10 01:03:27,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc94599e/930a293b36ca444392c2183e6d7d8fa6 [2022-01-10 01:03:27,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:03:27,121 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:03:27,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:03:27,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:03:27,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:03:27,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28cf5270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27, skipping insertion in model container [2022-01-10 01:03:27,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:03:27,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:03:27,235 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c[481,494] [2022-01-10 01:03:27,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:03:27,281 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:03:27,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c[481,494] [2022-01-10 01:03:27,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:03:27,300 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:03:27,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27 WrapperNode [2022-01-10 01:03:27,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:03:27,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:03:27,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:03:27,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:03:27,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,326 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 01:03:27,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:03:27,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:03:27,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:03:27,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:03:27,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:03:27,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:03:27,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:03:27,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:03:27,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (1/1) ... [2022-01-10 01:03:27,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:03:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:27,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 01:03:27,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 01:03:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:03:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:03:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:03:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-01-10 01:03:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-01-10 01:03:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:03:27,451 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:03:27,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:03:27,518 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:03:27,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:03:27,522 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:03:27,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:27 BoogieIcfgContainer [2022-01-10 01:03:27,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:03:27,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:03:27,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:03:27,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:03:27,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:03:27" (1/3) ... [2022-01-10 01:03:27,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c3234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:27, skipping insertion in model container [2022-01-10 01:03:27,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:27" (2/3) ... [2022-01-10 01:03:27,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8c3234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:27, skipping insertion in model container [2022-01-10 01:03:27,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:27" (3/3) ... [2022-01-10 01:03:27,543 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2022-01-10 01:03:27,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:03:27,547 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:03:27,590 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:03:27,611 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 01:03:27,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:03:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-01-10 01:03:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 01:03:27,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:27,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:27,634 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:27,638 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-01-10 01:03:27,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:27,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998310381] [2022-01-10 01:03:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:27,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:27,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:03:27,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:27,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998310381] [2022-01-10 01:03:27,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998310381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:03:27,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:03:27,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:03:27,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861444596] [2022-01-10 01:03:27,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:03:27,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:03:27,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:03:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:03:27,853 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 01:03:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:27,905 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-10 01:03:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:03:27,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 01:03:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:27,912 INFO L225 Difference]: With dead ends: 25 [2022-01-10 01:03:27,912 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 01:03:27,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:03:27,923 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:27,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 01:03:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 01:03:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 01:03:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-10 01:03:27,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-10 01:03:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:27,958 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-10 01:03:27,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 01:03:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-10 01:03:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 01:03:27,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:27,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:27,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:03:27,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-01-10 01:03:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779964864] [2022-01-10 01:03:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:27,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:03:28,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779964864] [2022-01-10 01:03:28,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779964864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132594967] [2022-01-10 01:03:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:28,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:28,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:28,075 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) [2022-01-10 01:03:28,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 01:03:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 01:03:28,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:03:28,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 01:03:28,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132594967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:28,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:28,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-01-10 01:03:28,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490509100] [2022-01-10 01:03:28,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:28,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 01:03:28,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 01:03:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-10 01:03:28,386 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 01:03:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:28,431 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-10 01:03:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:03:28,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-01-10 01:03:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:28,433 INFO L225 Difference]: With dead ends: 22 [2022-01-10 01:03:28,433 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 01:03:28,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:03:28,435 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:28,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 01:03:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 01:03:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 01:03:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-10 01:03:28,444 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-10 01:03:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:28,444 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-10 01:03:28,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 01:03:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-10 01:03:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 01:03:28,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:28,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:28,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:28,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:28,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-01-10 01:03:28,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:28,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968734273] [2022-01-10 01:03:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:28,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:03:28,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968734273] [2022-01-10 01:03:28,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968734273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549318757] [2022-01-10 01:03:28,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 01:03:28,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:28,756 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) [2022-01-10 01:03:28,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 01:03:28,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 01:03:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:28,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 01:03:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:03:28,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 01:03:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549318757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:29,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:29,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-01-10 01:03:29,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861237787] [2022-01-10 01:03:29,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:29,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 01:03:29,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 01:03:29,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:03:29,122 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 01:03:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:29,172 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-10 01:03:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 01:03:29,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-01-10 01:03:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:29,173 INFO L225 Difference]: With dead ends: 25 [2022-01-10 01:03:29,173 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 01:03:29,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-10 01:03:29,176 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:29,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 01:03:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 01:03:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:03:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 01:03:29,184 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-10 01:03:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:29,184 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 01:03:29,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 01:03:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 01:03:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 01:03:29,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:29,186 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:29,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 01:03:29,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-10 01:03:29,396 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:29,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:29,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-01-10 01:03:29,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:29,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552953442] [2022-01-10 01:03:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:29,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:29,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:29,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552953442] [2022-01-10 01:03:29,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552953442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:29,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787041170] [2022-01-10 01:03:29,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 01:03:29,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:29,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:29,497 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) [2022-01-10 01:03:29,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 01:03:29,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 01:03:29,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 01:03:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:29,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 01:03:30,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787041170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:30,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:30,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2022-01-10 01:03:30,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335200191] [2022-01-10 01:03:30,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:30,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 01:03:30,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 01:03:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-10 01:03:30,018 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-10 01:03:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:30,069 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-10 01:03:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 01:03:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-01-10 01:03:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:30,070 INFO L225 Difference]: With dead ends: 28 [2022-01-10 01:03:30,071 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 01:03:30,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-01-10 01:03:30,076 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:30,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 01:03:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 01:03:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:03:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-10 01:03:30,080 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-10 01:03:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:30,080 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-10 01:03:30,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-10 01:03:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-10 01:03:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 01:03:30,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:30,081 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:30,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:30,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:30,298 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:30,298 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-01-10 01:03:30,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:30,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947478473] [2022-01-10 01:03:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:30,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:30,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:30,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:30,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:30,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 01:03:30,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:30,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947478473] [2022-01-10 01:03:30,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947478473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:30,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461957313] [2022-01-10 01:03:30,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 01:03:30,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:30,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:30,464 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) [2022-01-10 01:03:30,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 01:03:30,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 01:03:30,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:30,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 01:03:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 01:03:30,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 01:03:31,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461957313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:31,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:31,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2022-01-10 01:03:31,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876564224] [2022-01-10 01:03:31,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:31,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 01:03:31,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 01:03:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-10 01:03:31,061 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 01:03:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:31,113 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-10 01:03:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:03:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-01-10 01:03:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:31,114 INFO L225 Difference]: With dead ends: 31 [2022-01-10 01:03:31,114 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 01:03:31,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:03:31,115 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:31,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 01:03:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 01:03:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:03:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-10 01:03:31,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-10 01:03:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:31,118 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-10 01:03:31,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 01:03:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-10 01:03:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 01:03:31,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:31,119 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:31,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:31,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:31,330 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:31,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-01-10 01:03:31,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:31,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950126185] [2022-01-10 01:03:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:31,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 01:03:31,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950126185] [2022-01-10 01:03:31,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950126185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072926060] [2022-01-10 01:03:31,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 01:03:31,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:31,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:31,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 01:03:31,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-10 01:03:31,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:31,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 01:03:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 01:03:31,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 01:03:32,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072926060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:32,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:32,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2022-01-10 01:03:32,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699685934] [2022-01-10 01:03:32,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:32,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 01:03:32,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:32,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 01:03:32,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-10 01:03:32,289 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 01:03:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:32,356 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-10 01:03:32,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 01:03:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-01-10 01:03:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:32,357 INFO L225 Difference]: With dead ends: 34 [2022-01-10 01:03:32,357 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 01:03:32,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-01-10 01:03:32,358 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:32,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 01:03:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 01:03:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 01:03:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-10 01:03:32,361 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-10 01:03:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:32,362 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-10 01:03:32,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 01:03:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-10 01:03:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 01:03:32,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:32,364 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:32,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:32,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:32,576 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-01-10 01:03:32,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:32,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900254462] [2022-01-10 01:03:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:32,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 01:03:32,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900254462] [2022-01-10 01:03:32,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900254462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82837192] [2022-01-10 01:03:32,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 01:03:32,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:32,720 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:32,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 01:03:32,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-10 01:03:32,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:32,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 01:03:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 01:03:32,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 01:03:33,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82837192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:33,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:33,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2022-01-10 01:03:33,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138932103] [2022-01-10 01:03:33,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:33,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 01:03:33,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:33,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 01:03:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-01-10 01:03:33,911 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 01:03:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:34,002 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-10 01:03:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 01:03:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-01-10 01:03:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:34,006 INFO L225 Difference]: With dead ends: 37 [2022-01-10 01:03:34,006 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 01:03:34,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2022-01-10 01:03:34,007 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:34,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 69 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:34,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 01:03:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 01:03:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 01:03:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-10 01:03:34,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-01-10 01:03:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:34,019 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-10 01:03:34,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 01:03:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-10 01:03:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 01:03:34,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:34,024 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:34,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-10 01:03:34,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:34,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-01-10 01:03:34,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:34,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134257168] [2022-01-10 01:03:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:34,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 01:03:34,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134257168] [2022-01-10 01:03:34,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134257168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59979152] [2022-01-10 01:03:34,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 01:03:34,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:34,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:34,404 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:34,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 01:03:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 01:03:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 01:03:34,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 01:03:36,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59979152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:36,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:36,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2022-01-10 01:03:36,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912491320] [2022-01-10 01:03:36,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:36,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 01:03:36,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 01:03:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-01-10 01:03:36,012 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-10 01:03:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:36,107 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-10 01:03:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 01:03:36,108 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-01-10 01:03:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:36,111 INFO L225 Difference]: With dead ends: 40 [2022-01-10 01:03:36,111 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 01:03:36,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2022-01-10 01:03:36,112 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:36,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 62 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 01:03:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-10 01:03:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 01:03:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-10 01:03:36,120 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-10 01:03:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:36,120 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-10 01:03:36,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-01-10 01:03:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-10 01:03:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 01:03:36,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:36,122 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:36,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:36,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:36,343 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:36,343 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-01-10 01:03:36,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:36,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743712353] [2022-01-10 01:03:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:36,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 01:03:36,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743712353] [2022-01-10 01:03:36,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743712353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:36,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306724548] [2022-01-10 01:03:36,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 01:03:36,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:36,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:36,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 01:03:36,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 01:03:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 01:03:36,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 01:03:36,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 01:03:38,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306724548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:38,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:38,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2022-01-10 01:03:38,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121282909] [2022-01-10 01:03:38,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:38,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 01:03:38,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 01:03:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-01-10 01:03:38,559 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-01-10 01:03:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:38,657 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-01-10 01:03:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 01:03:38,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-01-10 01:03:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:38,660 INFO L225 Difference]: With dead ends: 43 [2022-01-10 01:03:38,660 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 01:03:38,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 01:03:38,662 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:38,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 81 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:03:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 01:03:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-10 01:03:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 01:03:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-01-10 01:03:38,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-01-10 01:03:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:38,667 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-01-10 01:03:38,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-01-10 01:03:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-01-10 01:03:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 01:03:38,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:38,668 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:38,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:38,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-10 01:03:38,886 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:38,887 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-01-10 01:03:38,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:38,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311367599] [2022-01-10 01:03:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:38,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:38,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:38,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:38,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:38,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:39,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:39,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:39,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 01:03:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:03:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 01:03:39,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:03:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311367599] [2022-01-10 01:03:39,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311367599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:03:39,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407599662] [2022-01-10 01:03:39,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 01:03:39,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:03:39,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:03:39,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 01:03:39,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 01:03:39,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-10 01:03:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 01:03:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 01:03:39,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:03:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 01:03:39,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:03:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 01:03:41,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407599662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:03:41,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:03:41,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2022-01-10 01:03:41,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645036656] [2022-01-10 01:03:41,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:03:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 01:03:41,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:03:41,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 01:03:41,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-01-10 01:03:41,814 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2022-01-10 01:03:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:03:41,956 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-01-10 01:03:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 01:03:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 64 [2022-01-10 01:03:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:03:41,957 INFO L225 Difference]: With dead ends: 46 [2022-01-10 01:03:41,957 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 01:03:41,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 01:03:41,958 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:03:41,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 90 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:03:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 01:03:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-10 01:03:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 01:03:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-01-10 01:03:41,961 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-01-10 01:03:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:03:41,961 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-01-10 01:03:41,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2022-01-10 01:03:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-01-10 01:03:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 01:03:41,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:03:41,962 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:03:41,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-10 01:03:42,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-10 01:03:42,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:03:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:03:42,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-01-10 01:03:42,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:03:42,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95628767] [2022-01-10 01:03:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:03:42,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:03:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 01:03:42,185 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-10 01:03:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-10 01:03:42,213 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-10 01:03:42,213 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-10 01:03:42,214 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 01:03:42,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 01:03:42,217 INFO L732 BasicCegarLoop]: Path program histogram: [10, 1] [2022-01-10 01:03:42,219 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 01:03:42,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 01:03:42 BoogieIcfgContainer [2022-01-10 01:03:42,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 01:03:42,263 INFO L158 Benchmark]: Toolchain (without parser) took 15141.25ms. Allocated memory was 194.0MB in the beginning and 280.0MB in the end (delta: 86.0MB). Free memory was 145.2MB in the beginning and 152.5MB in the end (delta: -7.3MB). Peak memory consumption was 79.8MB. Max. memory is 8.0GB. [2022-01-10 01:03:42,263 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory was 161.1MB in the beginning and 161.0MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 01:03:42,263 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.21ms. Allocated memory is still 194.0MB. Free memory was 145.1MB in the beginning and 172.3MB in the end (delta: -27.2MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. [2022-01-10 01:03:42,264 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.12ms. Allocated memory is still 194.0MB. Free memory was 172.3MB in the beginning and 171.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:03:42,265 INFO L158 Benchmark]: Boogie Preprocessor took 19.32ms. Allocated memory is still 194.0MB. Free memory was 170.7MB in the beginning and 170.2MB in the end (delta: 526.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 01:03:42,265 INFO L158 Benchmark]: RCFGBuilder took 176.00ms. Allocated memory is still 194.0MB. Free memory was 170.2MB in the beginning and 160.7MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-10 01:03:42,265 INFO L158 Benchmark]: TraceAbstraction took 14737.65ms. Allocated memory was 194.0MB in the beginning and 280.0MB in the end (delta: 86.0MB). Free memory was 160.3MB in the beginning and 152.5MB in the end (delta: 7.7MB). Peak memory consumption was 94.2MB. Max. memory is 8.0GB. [2022-01-10 01:03:42,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 194.0MB. Free memory was 161.1MB in the beginning and 161.0MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 177.21ms. Allocated memory is still 194.0MB. Free memory was 145.1MB in the beginning and 172.3MB in the end (delta: -27.2MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.12ms. Allocated memory is still 194.0MB. Free memory was 172.3MB in the beginning and 171.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.32ms. Allocated memory is still 194.0MB. Free memory was 170.7MB in the beginning and 170.2MB in the end (delta: 526.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 176.00ms. Allocated memory is still 194.0MB. Free memory was 170.2MB in the beginning and 160.7MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 14737.65ms. Allocated memory was 194.0MB in the beginning and 280.0MB in the end (delta: 86.0MB). Free memory was 160.3MB in the beginning and 152.5MB in the end (delta: 7.7MB). Peak memory consumption was 94.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 10; [L15] int b = 0; VAL [a=10, b=0] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=10, m=0, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=9, m=1, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=8, m=2, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=7, m=3, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=6, m=4, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=5, m=5, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=4, m=6, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=3, m=7, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=2, m=8, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=1, m=9, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=10, \old(n)=0, \result=10, m=10, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1, m=9, n=1, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2, m=8, n=2, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3, m=7, n=3, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4, m=6, n=4, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5, m=5, n=5, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6, m=4, n=6, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7, m=3, n=7, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8, m=2, n=8, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9, m=1, n=9, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=10, m=0, n=10, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) VAL [a=10, b=0, sum(a, b)=10] [L16] int result = sum(a, b); [L17] COND TRUE result == a + b VAL [a=10, b=0, result=10] [L18] reach_error() VAL [a=10, b=0, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.6s, OverallIterations: 11, TraceHistogramMax: 11, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 655 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 580 mSDsluCounter, 543 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 451 mSDsCounter, 222 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 480 IncrementalHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 222 mSolverCounterUnsat, 92 mSDtfsCounter, 480 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 952 GetRequests, 749 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, InterpolantAutomatonStates: 95, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 800 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1062 ConstructedInterpolants, 0 QuantifiedInterpolants, 3041 SizeOfPredicates, 54 NumberOfNonLiveVariables, 1235 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 28 InterpolantComputations, 1 PerfectInterpolantSequences, 1065/2700 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 RESULT: Ultimate proved your program to be incorrect! [2022-01-10 01:03:42,299 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...