/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:28:20,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:28:20,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:28:20,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 23:28:20,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 23:28:20,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 23:28:20,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 23:28:20,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 23:28:20,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 23:28:20,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 23:28:20,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 23:28:20,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 23:28:20,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 23:28:20,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 23:28:20,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 23:28:20,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 23:28:20,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 23:28:20,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 23:28:20,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 23:28:20,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 23:28:20,924 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 23:28:20,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 23:28:20,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 23:28:20,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 23:28:20,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 23:28:20,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 23:28:20,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 23:28:20,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 23:28:20,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 23:28:20,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 23:28:20,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 23:28:20,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 23:28:20,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 23:28:20,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 23:28:20,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 23:28:20,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 23:28:20,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 23:28:20,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 23:28:20,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 23:28:20,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 23:28:20,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 23:28:20,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 23:28:20,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 23:28:20,957 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:28:20,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:28:20,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:28:20,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:28:20,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:28:20,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:28:20,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:28:20,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:28:20,962 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:28:20,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:28:20,963 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:28:20,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:28:20,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:28:20,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:28:20,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:28:20,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:28:20,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:28:20,964 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:28:20,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:28:20,964 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:28:20,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:28:20,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:28:20,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:28:20,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:28:20,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:28:20,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:28:20,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:28:20,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:28:20,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:28:20,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:28:20,966 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:28:20,966 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:28:20,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:28:20,966 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:28:21,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:28:21,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:28:21,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:28:21,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:28:21,211 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:28:21,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-19 23:28:21,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c2779ac/f15dfddee48349b19e9336fd02e3adc4/FLAG420100eff [2022-03-19 23:28:21,625 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:28:21,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-19 23:28:21,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c2779ac/f15dfddee48349b19e9336fd02e3adc4/FLAG420100eff [2022-03-19 23:28:22,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c2779ac/f15dfddee48349b19e9336fd02e3adc4 [2022-03-19 23:28:22,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:28:22,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:28:22,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:28:22,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:28:22,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:28:22,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1504bd94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22, skipping insertion in model container [2022-03-19 23:28:22,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:28:22,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:28:22,204 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c[899,912] [2022-03-19 23:28:22,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:28:22,213 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:28:22,225 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c[899,912] [2022-03-19 23:28:22,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:28:22,235 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:28:22,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22 WrapperNode [2022-03-19 23:28:22,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:28:22,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:28:22,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:28:22,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:28:22,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:28:22,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:28:22,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:28:22,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:28:22,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (1/1) ... [2022-03-19 23:28:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:28:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:22,292 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) [2022-03-19 23:28:22,312 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 [2022-03-19 23:28:22,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:28:22,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:28:22,332 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:28:22,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:28:22,333 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:28:22,334 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:28:22,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:28:22,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:28:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:28:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:28:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:28:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:28:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:28:22,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:28:22,400 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:28:22,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:28:22,544 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:28:22,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:28:22,549 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-19 23:28:22,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:28:22 BoogieIcfgContainer [2022-03-19 23:28:22,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:28:22,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:28:22,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:28:22,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:28:22,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:28:22" (1/3) ... [2022-03-19 23:28:22,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d46fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:28:22, skipping insertion in model container [2022-03-19 23:28:22,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:28:22" (2/3) ... [2022-03-19 23:28:22,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d46fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:28:22, skipping insertion in model container [2022-03-19 23:28:22,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:28:22" (3/3) ... [2022-03-19 23:28:22,565 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.c [2022-03-19 23:28:22,568 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:28:22,568 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:28:22,601 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:28:22,612 INFO L340 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 [2022-03-19 23:28:22,612 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:28:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:28:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-19 23:28:22,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:22,634 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:22,635 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1327885715, now seen corresponding path program 1 times [2022-03-19 23:28:22,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:22,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574930279] [2022-03-19 23:28:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:22,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:22,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:22,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574930279] [2022-03-19 23:28:22,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574930279] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:28:22,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:28:22,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:28:22,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862159789] [2022-03-19 23:28:22,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:28:22,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:28:22,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:28:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:28:22,801 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:22,828 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-03-19 23:28:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:28:22,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-19 23:28:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:22,836 INFO L225 Difference]: With dead ends: 42 [2022-03-19 23:28:22,836 INFO L226 Difference]: Without dead ends: 19 [2022-03-19 23:28:22,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:28:22,841 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:22,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-19 23:28:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-19 23:28:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-03-19 23:28:22,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-03-19 23:28:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:22,867 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-03-19 23:28:22,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-03-19 23:28:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-19 23:28:22,868 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:22,868 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:22,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:28:22,868 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1327937609, now seen corresponding path program 1 times [2022-03-19 23:28:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:22,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940322587] [2022-03-19 23:28:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:22,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940322587] [2022-03-19 23:28:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940322587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:28:22,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:28:22,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:28:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650688556] [2022-03-19 23:28:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:28:22,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:28:22,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:28:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:28:22,925 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:22,965 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-03-19 23:28:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:28:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-19 23:28:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:22,967 INFO L225 Difference]: With dead ends: 32 [2022-03-19 23:28:22,967 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 23:28:22,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:28:22,969 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:22,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:22,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 23:28:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-03-19 23:28:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-19 23:28:22,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-03-19 23:28:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:22,975 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-19 23:28:22,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-19 23:28:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:28:22,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:22,976 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:22,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:28:22,977 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash 365342218, now seen corresponding path program 1 times [2022-03-19 23:28:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:22,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460905321] [2022-03-19 23:28:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:22,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:23,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460905321] [2022-03-19 23:28:23,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460905321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:28:23,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:28:23,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:28:23,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709336067] [2022-03-19 23:28:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:28:23,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:28:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:28:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:28:23,030 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:23,071 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-19 23:28:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:28:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 23:28:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:23,072 INFO L225 Difference]: With dead ends: 41 [2022-03-19 23:28:23,072 INFO L226 Difference]: Without dead ends: 28 [2022-03-19 23:28:23,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:28:23,074 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:23,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-19 23:28:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-03-19 23:28:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-19 23:28:23,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-03-19 23:28:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:23,080 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-19 23:28:23,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-19 23:28:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 23:28:23,081 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:23,081 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:23,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:28:23,081 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash -903990269, now seen corresponding path program 1 times [2022-03-19 23:28:23,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772204904] [2022-03-19 23:28:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:23,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772204904] [2022-03-19 23:28:23,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772204904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:28:23,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:28:23,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:28:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005600587] [2022-03-19 23:28:23,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:28:23,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:28:23,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:23,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:28:23,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:28:23,134 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:23,181 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-03-19 23:28:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:28:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 23:28:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:23,182 INFO L225 Difference]: With dead ends: 41 [2022-03-19 23:28:23,182 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 23:28:23,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:28:23,183 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:23,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 23:28:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-03-19 23:28:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-03-19 23:28:23,189 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-03-19 23:28:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:23,189 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-03-19 23:28:23,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-03-19 23:28:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-19 23:28:23,190 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:23,191 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:23,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 23:28:23,191 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 761147182, now seen corresponding path program 1 times [2022-03-19 23:28:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089971709] [2022-03-19 23:28:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:23,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:23,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089971709] [2022-03-19 23:28:23,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089971709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:28:23,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:28:23,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:28:23,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57349959] [2022-03-19 23:28:23,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:28:23,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:28:23,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:23,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:28:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:28:23,233 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:23,281 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-19 23:28:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:28:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-19 23:28:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:23,282 INFO L225 Difference]: With dead ends: 41 [2022-03-19 23:28:23,282 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 23:28:23,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:28:23,284 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:23,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 23:28:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-03-19 23:28:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-19 23:28:23,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2022-03-19 23:28:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:23,294 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-19 23:28:23,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-19 23:28:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 23:28:23,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:23,295 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:23,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-19 23:28:23,296 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash 317096575, now seen corresponding path program 1 times [2022-03-19 23:28:23,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:23,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395515180] [2022-03-19 23:28:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:23,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:23,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395515180] [2022-03-19 23:28:23,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395515180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:28:23,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:28:23,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:28:23,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157567787] [2022-03-19 23:28:23,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:28:23,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:28:23,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:28:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:28:23,379 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:23,428 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-03-19 23:28:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:28:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 23:28:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:23,429 INFO L225 Difference]: With dead ends: 41 [2022-03-19 23:28:23,429 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 23:28:23,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:28:23,431 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:23,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 23:28:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-19 23:28:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-03-19 23:28:23,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 21 [2022-03-19 23:28:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:23,436 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-03-19 23:28:23,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-03-19 23:28:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:28:23,437 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:23,437 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:23,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-19 23:28:23,437 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash 720998685, now seen corresponding path program 1 times [2022-03-19 23:28:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:23,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423853243] [2022-03-19 23:28:23,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423853243] [2022-03-19 23:28:23,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423853243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:23,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512143877] [2022-03-19 23:28:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:23,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:23,499 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) [2022-03-19 23:28:23,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:28:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 23:28:23,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:23,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512143877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:23,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:23,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:28:23,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587054766] [2022-03-19 23:28:23,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:23,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:28:23,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:28:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:28:23,732 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:23,813 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-03-19 23:28:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:28:23,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 23:28:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:23,817 INFO L225 Difference]: With dead ends: 47 [2022-03-19 23:28:23,817 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 23:28:23,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:28:23,825 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:23,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 23:28:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-19 23:28:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-19 23:28:23,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-03-19 23:28:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:23,838 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-19 23:28:23,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-19 23:28:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 23:28:23,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:23,839 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:23,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 23:28:24,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:24,040 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash -365223945, now seen corresponding path program 2 times [2022-03-19 23:28:24,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:24,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781026231] [2022-03-19 23:28:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:24,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:24,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 23:28:24,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781026231] [2022-03-19 23:28:24,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781026231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886679356] [2022-03-19 23:28:24,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:28:24,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:24,093 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) [2022-03-19 23:28:24,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:28:24,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:28:24,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:24,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:28:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:24,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:28:24,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886679356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:24,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:24,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 11 [2022-03-19 23:28:24,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314798675] [2022-03-19 23:28:24,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:24,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 23:28:24,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 23:28:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:28:24,309 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:24,626 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-03-19 23:28:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:28:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 23:28:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:24,631 INFO L225 Difference]: With dead ends: 86 [2022-03-19 23:28:24,631 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 23:28:24,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:28:24,634 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:24,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 41 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:28:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 23:28:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-03-19 23:28:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-03-19 23:28:24,644 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2022-03-19 23:28:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:24,645 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-03-19 23:28:24,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-03-19 23:28:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 23:28:24,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:24,646 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:24,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:24,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-19 23:28:24,860 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:24,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -917097330, now seen corresponding path program 3 times [2022-03-19 23:28:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:24,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210836407] [2022-03-19 23:28:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:24,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-19 23:28:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:24,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210836407] [2022-03-19 23:28:24,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210836407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:24,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736851327] [2022-03-19 23:28:24,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:28:24,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:24,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:24,932 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) [2022-03-19 23:28:24,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:28:24,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:28:24,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-19 23:28:24,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-19 23:28:25,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-19 23:28:25,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736851327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:25,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:25,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-19 23:28:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72073604] [2022-03-19 23:28:25,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:25,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:28:25,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:28:25,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:28:25,172 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:25,396 INFO L93 Difference]: Finished difference Result 468 states and 524 transitions. [2022-03-19 23:28:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:28:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-19 23:28:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:25,398 INFO L225 Difference]: With dead ends: 468 [2022-03-19 23:28:25,399 INFO L226 Difference]: Without dead ends: 426 [2022-03-19 23:28:25,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2022-03-19 23:28:25,400 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 331 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:25,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 31 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:28:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-19 23:28:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 298. [2022-03-19 23:28:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 294 states have (on average 1.1122448979591837) internal successors, (327), 294 states have internal predecessors, (327), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 330 transitions. [2022-03-19 23:28:25,447 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 330 transitions. Word has length 48 [2022-03-19 23:28:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:25,448 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 330 transitions. [2022-03-19 23:28:25,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 330 transitions. [2022-03-19 23:28:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-03-19 23:28:25,453 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:25,453 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:25,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:25,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:25,668 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1257232793, now seen corresponding path program 4 times [2022-03-19 23:28:25,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948738589] [2022-03-19 23:28:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:25,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:25,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 4294 proven. 1 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-03-19 23:28:25,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:25,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948738589] [2022-03-19 23:28:25,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948738589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:25,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455900105] [2022-03-19 23:28:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:28:25,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:25,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:25,791 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) [2022-03-19 23:28:25,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:28:25,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:28:25,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:28:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-19 23:28:26,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-19 23:28:26,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455900105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:26,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:26,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-19 23:28:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45997505] [2022-03-19 23:28:26,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:26,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 23:28:26,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 23:28:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:28:26,880 INFO L87 Difference]: Start difference. First operand 298 states and 330 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:27,329 INFO L93 Difference]: Finished difference Result 2576 states and 2892 transitions. [2022-03-19 23:28:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:28:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-03-19 23:28:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:27,337 INFO L225 Difference]: With dead ends: 2576 [2022-03-19 23:28:27,337 INFO L226 Difference]: Without dead ends: 2286 [2022-03-19 23:28:27,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:28:27,340 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 230 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:27,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 36 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:28:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-03-19 23:28:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1534. [2022-03-19 23:28:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1530 states have (on average 1.0816993464052287) internal successors, (1655), 1530 states have internal predecessors, (1655), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 1658 transitions. [2022-03-19 23:28:27,501 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 1658 transitions. Word has length 297 [2022-03-19 23:28:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:27,502 INFO L478 AbstractCegarLoop]: Abstraction has 1534 states and 1658 transitions. [2022-03-19 23:28:27,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 1658 transitions. [2022-03-19 23:28:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1534 [2022-03-19 23:28:27,557 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:27,557 INFO L499 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:27,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:27,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:27,780 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1704348023, now seen corresponding path program 5 times [2022-03-19 23:28:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:27,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751650393] [2022-03-19 23:28:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:27,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:28,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 88166 proven. 3149 refuted. 0 times theorem prover too weak. 311023 trivial. 0 not checked. [2022-03-19 23:28:28,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:28,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751650393] [2022-03-19 23:28:28,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751650393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:28,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191753933] [2022-03-19 23:28:28,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:28:28,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:28,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:28,660 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) [2022-03-19 23:28:28,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:28:28,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-03-19 23:28:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:28,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:28:28,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-19 23:28:30,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-19 23:28:32,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191753933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:32,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:32,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 23:28:32,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171568126] [2022-03-19 23:28:32,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:32,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:28:32,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:28:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:28:32,709 INFO L87 Difference]: Start difference. First operand 1534 states and 1658 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:33,161 INFO L93 Difference]: Finished difference Result 5849 states and 6338 transitions. [2022-03-19 23:28:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:28:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1533 [2022-03-19 23:28:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:33,177 INFO L225 Difference]: With dead ends: 5849 [2022-03-19 23:28:33,177 INFO L226 Difference]: Without dead ends: 4510 [2022-03-19 23:28:33,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3078 GetRequests, 3064 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:28:33,180 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:33,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 33 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:28:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-03-19 23:28:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2022-03-19 23:28:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4506 states have (on average 1.0774522858411009) internal successors, (4855), 4506 states have internal predecessors, (4855), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 4858 transitions. [2022-03-19 23:28:33,558 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 4858 transitions. Word has length 1533 [2022-03-19 23:28:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:33,559 INFO L478 AbstractCegarLoop]: Abstraction has 4510 states and 4858 transitions. [2022-03-19 23:28:33,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 4858 transitions. [2022-03-19 23:28:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4510 [2022-03-19 23:28:33,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:33,708 INFO L499 BasicCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:33,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:33,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 23:28:33,910 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1746954377, now seen corresponding path program 6 times [2022-03-19 23:28:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:33,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602707834] [2022-03-19 23:28:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:33,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:38,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359703 proven. 113309 refuted. 0 times theorem prover too weak. 2150622 trivial. 0 not checked. [2022-03-19 23:28:38,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602707834] [2022-03-19 23:28:38,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602707834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413238211] [2022-03-19 23:28:38,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:28:38,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:38,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:38,806 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) [2022-03-19 23:28:38,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:28:42,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 753 check-sat command(s) [2022-03-19 23:28:42,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 5371 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 23:28:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-19 23:28:48,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-19 23:28:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413238211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:52,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:52,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 23:28:52,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212098335] [2022-03-19 23:28:52,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:52,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:28:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:52,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:28:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:28:52,776 INFO L87 Difference]: Start difference. First operand 4510 states and 4858 transitions. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:53,760 INFO L93 Difference]: Finished difference Result 16866 states and 18179 transitions. [2022-03-19 23:28:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:28:53,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 4509 [2022-03-19 23:28:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:53,809 INFO L225 Difference]: With dead ends: 16866 [2022-03-19 23:28:53,809 INFO L226 Difference]: Without dead ends: 13486 [2022-03-19 23:28:53,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9030 GetRequests, 9016 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:28:53,818 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:53,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 43 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:28:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2022-03-19 23:28:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 13486. [2022-03-19 23:28:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13486 states, 13482 states have (on average 1.0769173713098947) internal successors, (14519), 13482 states have internal predecessors, (14519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13486 states to 13486 states and 14522 transitions. [2022-03-19 23:28:54,841 INFO L78 Accepts]: Start accepts. Automaton has 13486 states and 14522 transitions. Word has length 4509 [2022-03-19 23:28:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:54,842 INFO L478 AbstractCegarLoop]: Abstraction has 13486 states and 14522 transitions. [2022-03-19 23:28:54,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 13486 states and 14522 transitions. [2022-03-19 23:28:55,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13486 [2022-03-19 23:28:55,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:55,965 INFO L499 BasicCegarLoop]: trace histogram [5184, 5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:55,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:56,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:56,166 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash -390464905, now seen corresponding path program 7 times [2022-03-19 23:28:56,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902115637] [2022-03-19 23:28:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:56,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:29:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:39,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:29:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-19 23:29:40,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:29:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902115637] [2022-03-19 23:29:40,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902115637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:29:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644980372] [2022-03-19 23:29:40,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:29:40,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:29:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:29:40,882 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) [2022-03-19 23:29:40,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:29:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:29:44,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 21820 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:29:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:30:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-19 23:30:06,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:30:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-19 23:30:29,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644980372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:30:29,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:30:29,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-19 23:30:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76958727] [2022-03-19 23:30:29,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:30:29,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 23:30:29,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:30:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 23:30:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:30:29,553 INFO L87 Difference]: Start difference. First operand 13486 states and 14522 transitions. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:30:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:30:30,834 INFO L93 Difference]: Finished difference Result 20227 states and 21782 transitions. [2022-03-19 23:30:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:30:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13485 [2022-03-19 23:30:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:30:30,902 INFO L225 Difference]: With dead ends: 20227 [2022-03-19 23:30:30,902 INFO L226 Difference]: Without dead ends: 20224 [2022-03-19 23:30:30,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26984 GetRequests, 26969 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-19 23:30:30,909 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:30:30,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 38 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:30:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2022-03-19 23:30:32,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 20224. [2022-03-19 23:30:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20224 states, 20220 states have (on average 1.0769040553907023) internal successors, (21775), 20220 states have internal predecessors, (21775), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:30:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20224 states to 20224 states and 21778 transitions. [2022-03-19 23:30:32,236 INFO L78 Accepts]: Start accepts. Automaton has 20224 states and 21778 transitions. Word has length 13485 [2022-03-19 23:30:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:30:32,250 INFO L478 AbstractCegarLoop]: Abstraction has 20224 states and 21778 transitions. [2022-03-19 23:30:32,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:30:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 20224 states and 21778 transitions. [2022-03-19 23:30:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20224 [2022-03-19 23:30:34,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:30:34,639 INFO L499 BasicCegarLoop]: trace histogram [7776, 7776, 1296, 1296, 1296, 216, 216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:30:34,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:30:34,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:34,844 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:30:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:30:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash -169087017, now seen corresponding path program 8 times [2022-03-19 23:30:34,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:30:34,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405367210] [2022-03-19 23:30:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:30:34,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:31:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat