/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:37:53,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:37:53,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:37:53,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:37:53,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:37:53,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:37:53,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:37:53,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:37:53,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:37:53,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:37:53,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:37:53,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:37:53,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:37:53,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:37:53,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:37:53,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:37:53,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:37:53,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:37:53,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:37:53,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:37:53,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:37:53,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:37:53,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:37:53,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:37:53,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:37:53,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:37:53,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:37:53,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:37:53,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:37:53,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:37:53,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:37:53,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:37:53,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:37:53,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:37:53,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:37:53,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:37:53,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:37:53,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:37:53,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:37:53,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:37:53,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:37:53,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:37:54,031 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:37:54,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:37:54,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:37:54,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:37:54,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:37:54,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:37:54,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:37:54,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:37:54,033 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:37:54,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:37:54,034 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:37:54,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:37:54,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:37:54,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:37:54,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:37:54,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:37:54,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:54,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:37:54,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:37:54,037 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:37:54,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:37:54,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:37:54,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:37:54,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:37:54,299 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:37:54,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2022-01-10 06:37:54,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2599487/f34afb28467143efad56d41aecf2defa/FLAG424b67eaa [2022-01-10 06:37:54,679 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:37:54,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2022-01-10 06:37:54,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2599487/f34afb28467143efad56d41aecf2defa/FLAG424b67eaa [2022-01-10 06:37:54,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2599487/f34afb28467143efad56d41aecf2defa [2022-01-10 06:37:54,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:37:54,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:37:54,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:54,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:37:54,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:37:54,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2138cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54, skipping insertion in model container [2022-01-10 06:37:54,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:37:54,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:37:54,865 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c[949,962] [2022-01-10 06:37:54,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:54,886 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:37:54,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c[949,962] [2022-01-10 06:37:54,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:54,922 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:37:54,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54 WrapperNode [2022-01-10 06:37:54,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:54,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:54,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:37:54,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:37:54,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,953 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 06:37:54,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:54,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:37:54,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:37:54,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:37:54,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:37:54,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:37:54,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:37:54,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:37:54,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (1/1) ... [2022-01-10 06:37:54,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:37:55,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 06:37:55,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 06:37:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:37:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:37:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 06:37:55,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 06:37:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 06:37:55,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 06:37:55,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:37:55,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:37:55,118 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:37:55,120 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:37:55,201 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:37:55,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:37:55,206 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:37:55,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:55 BoogieIcfgContainer [2022-01-10 06:37:55,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:37:55,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:37:55,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:37:55,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:37:55,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:37:54" (1/3) ... [2022-01-10 06:37:55,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4750125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:55, skipping insertion in model container [2022-01-10 06:37:55,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:54" (2/3) ... [2022-01-10 06:37:55,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4750125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:55, skipping insertion in model container [2022-01-10 06:37:55,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:55" (3/3) ... [2022-01-10 06:37:55,215 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2022-01-10 06:37:55,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:37:55,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:37:55,255 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:37:55,261 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 06:37:55,261 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:37:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:37:55,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:55,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:55,278 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:55,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1014607960, now seen corresponding path program 1 times [2022-01-10 06:37:55,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:55,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318926703] [2022-01-10 06:37:55,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:55,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:55,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:55,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:55,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:37:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:55,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:37:55,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:55,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:55,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318926703] [2022-01-10 06:37:55,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318926703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:55,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:55,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:55,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887436803] [2022-01-10 06:37:55,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:55,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:55,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:55,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:55,550 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:55,650 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-10 06:37:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:55,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:37:55,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:55,660 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:37:55,660 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 06:37:55,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:37:55,671 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:55,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 06:37:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 06:37:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 06:37:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 06:37:55,727 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 06:37:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:55,728 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 06:37:55,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 06:37:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:37:55,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:55,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:55,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:55,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:55,940 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:55,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2131805067, now seen corresponding path program 1 times [2022-01-10 06:37:55,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:55,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100726353] [2022-01-10 06:37:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:55,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:55,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:55,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:37:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:55,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:55,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:37:56,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:56,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100726353] [2022-01-10 06:37:56,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100726353] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:56,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:56,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:56,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959152910] [2022-01-10 06:37:56,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:56,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:56,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:56,028 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:56,081 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 06:37:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:56,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:37:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:56,083 INFO L225 Difference]: With dead ends: 31 [2022-01-10 06:37:56,083 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:37:56,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:37:56,085 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:56,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:37:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 06:37:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 06:37:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 06:37:56,091 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 06:37:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:56,092 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 06:37:56,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:37:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 06:37:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:37:56,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:56,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:56,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:56,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:56,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1494555912, now seen corresponding path program 1 times [2022-01-10 06:37:56,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:56,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037749657] [2022-01-10 06:37:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:56,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:56,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:56,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:56,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:37:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:56,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:37:56,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:37:56,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:56,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037749657] [2022-01-10 06:37:56,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037749657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:56,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:56,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:37:56,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732828534] [2022-01-10 06:37:56,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:56,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:37:56,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:37:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:37:56,778 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:56,947 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-10 06:37:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:37:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2022-01-10 06:37:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:56,949 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:37:56,950 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 06:37:56,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:37:56,951 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:56,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 06:37:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-10 06:37:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 06:37:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 06:37:56,959 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-10 06:37:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:56,959 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 06:37:56,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 06:37:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:37:56,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:56,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:56,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:57,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:57,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:57,170 INFO L85 PathProgramCache]: Analyzing trace with hash 814571350, now seen corresponding path program 1 times [2022-01-10 06:37:57,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:57,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129973921] [2022-01-10 06:37:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:57,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:57,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:57,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:57,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:37:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:57,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:37:57,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:37:57,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:57,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129973921] [2022-01-10 06:37:57,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129973921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:57,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:57,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:37:57,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354407744] [2022-01-10 06:37:57,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:57,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:37:57,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:37:57,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:37:57,483 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:57,606 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2022-01-10 06:37:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:37:57,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2022-01-10 06:37:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:57,608 INFO L225 Difference]: With dead ends: 61 [2022-01-10 06:37:57,608 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 06:37:57,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:37:57,610 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:57,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 115 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:57,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 06:37:57,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-01-10 06:37:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 06:37:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-10 06:37:57,619 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 23 [2022-01-10 06:37:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:57,619 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-10 06:37:57,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:37:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-10 06:37:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:37:57,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:57,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:57,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:57,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:57,830 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1581983960, now seen corresponding path program 1 times [2022-01-10 06:37:57,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:57,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363909184] [2022-01-10 06:37:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:57,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:57,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:57,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:37:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:37:57,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:37:58,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:58,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363909184] [2022-01-10 06:37:58,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363909184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:58,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:58,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-01-10 06:37:58,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748753985] [2022-01-10 06:37:58,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:58,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:37:58,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:58,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:37:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:37:58,419 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:37:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:58,657 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-01-10 06:37:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:37:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 34 [2022-01-10 06:37:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:58,659 INFO L225 Difference]: With dead ends: 49 [2022-01-10 06:37:58,659 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 06:37:58,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:58,660 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:58,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 153 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 06:37:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-01-10 06:37:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:37:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2022-01-10 06:37:58,675 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 34 [2022-01-10 06:37:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:58,675 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2022-01-10 06:37:58,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:37:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2022-01-10 06:37:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 06:37:58,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:58,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:58,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:58,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:58,878 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1656487097, now seen corresponding path program 1 times [2022-01-10 06:37:58,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:58,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558630261] [2022-01-10 06:37:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:58,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:58,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:58,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:37:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:58,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:58,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:37:59,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:37:59,303 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:59,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558630261] [2022-01-10 06:37:59,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558630261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:59,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:59,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-01-10 06:37:59,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481293652] [2022-01-10 06:37:59,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:59,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:37:59,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:37:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:37:59,305 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:37:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:59,475 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2022-01-10 06:37:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:37:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 35 [2022-01-10 06:37:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:59,478 INFO L225 Difference]: With dead ends: 79 [2022-01-10 06:37:59,478 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 06:37:59,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:59,479 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:59,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 152 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 06:37:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 06:37:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 10 states have call successors, (10), 2 states have call predecessors, (10), 9 states have return successors, (37), 14 states have call predecessors, (37), 10 states have call successors, (37) [2022-01-10 06:37:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2022-01-10 06:37:59,490 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 35 [2022-01-10 06:37:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:59,490 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2022-01-10 06:37:59,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:37:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2022-01-10 06:37:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 06:37:59,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:59,493 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:59,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:59,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:59,702 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:59,702 INFO L85 PathProgramCache]: Analyzing trace with hash 600804856, now seen corresponding path program 2 times [2022-01-10 06:37:59,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:59,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590942185] [2022-01-10 06:37:59,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:59,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:59,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:37:59,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:37:59,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:59,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:37:59,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:37:59,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:38:00,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590942185] [2022-01-10 06:38:00,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590942185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:00,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:00,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2022-01-10 06:38:00,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92367152] [2022-01-10 06:38:00,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:00,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:00,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:00,548 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:00,906 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2022-01-10 06:38:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:38:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 46 [2022-01-10 06:38:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:00,908 INFO L225 Difference]: With dead ends: 70 [2022-01-10 06:38:00,908 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 06:38:00,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:38:00,909 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:00,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 156 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 06:38:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2022-01-10 06:38:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 10 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2022-01-10 06:38:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 90 transitions. [2022-01-10 06:38:00,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 90 transitions. Word has length 46 [2022-01-10 06:38:00,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:00,928 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 90 transitions. [2022-01-10 06:38:00,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 90 transitions. [2022-01-10 06:38:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 06:38:00,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:00,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:00,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:01,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:01,131 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1482129412, now seen corresponding path program 1 times [2022-01-10 06:38:01,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989102649] [2022-01-10 06:38:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:01,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:01,134 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:01,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:38:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:38:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:38:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:38:01,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989102649] [2022-01-10 06:38:01,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989102649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:01,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:01,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2022-01-10 06:38:01,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415418001] [2022-01-10 06:38:01,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:01,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:01,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:01,715 INFO L87 Difference]: Start difference. First operand 50 states and 90 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:01,962 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2022-01-10 06:38:01,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:38:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 47 [2022-01-10 06:38:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:01,964 INFO L225 Difference]: With dead ends: 108 [2022-01-10 06:38:01,964 INFO L226 Difference]: Without dead ends: 61 [2022-01-10 06:38:01,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:01,966 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:01,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 208 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-10 06:38:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-10 06:38:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2022-01-10 06:38:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2022-01-10 06:38:01,986 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 47 [2022-01-10 06:38:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:01,986 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2022-01-10 06:38:01,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2022-01-10 06:38:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 06:38:01,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:01,997 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:02,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:02,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:02,209 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -425933224, now seen corresponding path program 3 times [2022-01-10 06:38:02,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:02,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554493842] [2022-01-10 06:38:02,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:02,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:02,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:02,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:38:02,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 06:38:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:38:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:38:02,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:38:02,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:02,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554493842] [2022-01-10 06:38:02,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554493842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:02,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:02,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:38:02,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131822831] [2022-01-10 06:38:02,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:02,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:38:02,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:02,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:38:02,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:02,665 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 06:38:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:02,803 INFO L93 Difference]: Finished difference Result 83 states and 163 transitions. [2022-01-10 06:38:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:38:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 58 [2022-01-10 06:38:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:02,805 INFO L225 Difference]: With dead ends: 83 [2022-01-10 06:38:02,805 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 06:38:02,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:02,806 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:02,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 06:38:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2022-01-10 06:38:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2022-01-10 06:38:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2022-01-10 06:38:02,820 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 58 [2022-01-10 06:38:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:02,820 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2022-01-10 06:38:02,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 06:38:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2022-01-10 06:38:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:38:02,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:02,822 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:02,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:03,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:03,031 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:03,031 INFO L85 PathProgramCache]: Analyzing trace with hash -354787678, now seen corresponding path program 2 times [2022-01-10 06:38:03,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:03,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958249488] [2022-01-10 06:38:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:03,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:03,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:03,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:38:03,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:03,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:38:03,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:38:04,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:04,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958249488] [2022-01-10 06:38:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958249488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:04,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:04,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2022-01-10 06:38:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18110175] [2022-01-10 06:38:04,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:04,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:38:04,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:38:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:38:04,154 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 06:38:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:04,818 INFO L93 Difference]: Finished difference Result 163 states and 460 transitions. [2022-01-10 06:38:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:38:04,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) Word has length 59 [2022-01-10 06:38:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:04,821 INFO L225 Difference]: With dead ends: 163 [2022-01-10 06:38:04,821 INFO L226 Difference]: Without dead ends: 105 [2022-01-10 06:38:04,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:04,823 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:04,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 181 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 06:38:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-10 06:38:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-01-10 06:38:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 20 states have call successors, (20), 5 states have call predecessors, (20), 22 states have return successors, (150), 33 states have call predecessors, (150), 20 states have call successors, (150) [2022-01-10 06:38:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 232 transitions. [2022-01-10 06:38:04,842 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 232 transitions. Word has length 59 [2022-01-10 06:38:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:04,842 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 232 transitions. [2022-01-10 06:38:04,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 06:38:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 232 transitions. [2022-01-10 06:38:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:38:04,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:04,844 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:04,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:05,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:05,053 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1748552912, now seen corresponding path program 2 times [2022-01-10 06:38:05,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:05,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27132714] [2022-01-10 06:38:05,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:05,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:05,056 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:05,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:38:05,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 59 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 06:38:05,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 06:38:05,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:05,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27132714] [2022-01-10 06:38:05,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27132714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:05,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:05,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2022-01-10 06:38:05,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170850283] [2022-01-10 06:38:05,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:05,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:38:05,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:38:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:38:05,862 INFO L87 Difference]: Start difference. First operand 99 states and 232 transitions. Second operand has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:38:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:06,096 INFO L93 Difference]: Finished difference Result 209 states and 648 transitions. [2022-01-10 06:38:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:38:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) Word has length 72 [2022-01-10 06:38:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:06,099 INFO L225 Difference]: With dead ends: 209 [2022-01-10 06:38:06,099 INFO L226 Difference]: Without dead ends: 113 [2022-01-10 06:38:06,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:38:06,101 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:06,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 194 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-10 06:38:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2022-01-10 06:38:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 62 states have (on average 1.096774193548387) internal successors, (68), 66 states have internal predecessors, (68), 22 states have call successors, (22), 5 states have call predecessors, (22), 25 states have return successors, (186), 38 states have call predecessors, (186), 22 states have call successors, (186) [2022-01-10 06:38:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2022-01-10 06:38:06,123 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 72 [2022-01-10 06:38:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:06,124 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2022-01-10 06:38:06,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:38:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2022-01-10 06:38:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:38:06,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:06,130 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:06,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:06,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:06,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:06,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:06,339 INFO L85 PathProgramCache]: Analyzing trace with hash -971041873, now seen corresponding path program 3 times [2022-01-10 06:38:06,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:06,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414659658] [2022-01-10 06:38:06,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:06,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:06,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:06,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:06,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:38:06,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:38:06,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:06,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:06,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 229 proven. 5 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-01-10 06:38:06,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 169 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-01-10 06:38:07,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:07,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414659658] [2022-01-10 06:38:07,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414659658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:07,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:07,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:38:07,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66524744] [2022-01-10 06:38:07,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:07,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:07,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:07,492 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:07,768 INFO L93 Difference]: Finished difference Result 223 states and 708 transitions. [2022-01-10 06:38:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) Word has length 131 [2022-01-10 06:38:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:07,771 INFO L225 Difference]: With dead ends: 223 [2022-01-10 06:38:07,771 INFO L226 Difference]: Without dead ends: 116 [2022-01-10 06:38:07,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:07,774 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:07,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 150 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-10 06:38:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-10 06:38:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 22 states have call successors, (22), 5 states have call predecessors, (22), 27 states have return successors, (179), 40 states have call predecessors, (179), 22 states have call successors, (179) [2022-01-10 06:38:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 273 transitions. [2022-01-10 06:38:07,790 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 273 transitions. Word has length 131 [2022-01-10 06:38:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:07,790 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 273 transitions. [2022-01-10 06:38:07,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 273 transitions. [2022-01-10 06:38:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 06:38:07,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:07,795 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:07,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:08,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:08,009 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1871760231, now seen corresponding path program 1 times [2022-01-10 06:38:08,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:08,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043808092] [2022-01-10 06:38:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:08,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:08,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:08,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:08,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:38:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:08,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-10 06:38:08,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 21 proven. 147 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-10 06:38:09,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:09,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043808092] [2022-01-10 06:38:09,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043808092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:09,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:09,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2022-01-10 06:38:09,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056806681] [2022-01-10 06:38:09,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:09,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:38:09,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:38:09,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:09,503 INFO L87 Difference]: Start difference. First operand 116 states and 273 transitions. Second operand has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:10,568 INFO L93 Difference]: Finished difference Result 324 states and 1037 transitions. [2022-01-10 06:38:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:38:10,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 109 [2022-01-10 06:38:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:10,573 INFO L225 Difference]: With dead ends: 324 [2022-01-10 06:38:10,573 INFO L226 Difference]: Without dead ends: 209 [2022-01-10 06:38:10,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:38:10,576 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:10,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 240 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:38:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-10 06:38:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2022-01-10 06:38:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 114 states have (on average 1.105263157894737) internal successors, (126), 118 states have internal predecessors, (126), 35 states have call successors, (35), 13 states have call predecessors, (35), 44 states have return successors, (328), 62 states have call predecessors, (328), 35 states have call successors, (328) [2022-01-10 06:38:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 489 transitions. [2022-01-10 06:38:10,619 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 489 transitions. Word has length 109 [2022-01-10 06:38:10,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:10,619 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 489 transitions. [2022-01-10 06:38:10,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 489 transitions. [2022-01-10 06:38:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 06:38:10,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:10,623 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:10,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:10,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:10,833 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:10,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1266739771, now seen corresponding path program 2 times [2022-01-10 06:38:10,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:10,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724777564] [2022-01-10 06:38:10,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:10,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:10,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:10,835 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:10,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:38:10,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:10,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:10,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 51 proven. 191 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2022-01-10 06:38:11,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 51 proven. 207 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-01-10 06:38:12,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:12,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724777564] [2022-01-10 06:38:12,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724777564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:12,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:12,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2022-01-10 06:38:12,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150781599] [2022-01-10 06:38:12,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:12,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:38:12,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:12,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:38:12,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:12,059 INFO L87 Difference]: Start difference. First operand 194 states and 489 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:12,358 INFO L93 Difference]: Finished difference Result 406 states and 1364 transitions. [2022-01-10 06:38:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:12,359 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 145 [2022-01-10 06:38:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:12,363 INFO L225 Difference]: With dead ends: 406 [2022-01-10 06:38:12,363 INFO L226 Difference]: Without dead ends: 215 [2022-01-10 06:38:12,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 270 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:38:12,366 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:12,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 270 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-10 06:38:12,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-01-10 06:38:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 130 states have internal predecessors, (138), 38 states have call successors, (38), 13 states have call predecessors, (38), 50 states have return successors, (417), 71 states have call predecessors, (417), 38 states have call successors, (417) [2022-01-10 06:38:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 593 transitions. [2022-01-10 06:38:12,393 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 593 transitions. Word has length 145 [2022-01-10 06:38:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:12,394 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 593 transitions. [2022-01-10 06:38:12,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 593 transitions. [2022-01-10 06:38:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-10 06:38:12,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:12,401 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 22, 22, 20, 15, 14, 14, 14, 14, 14, 14, 14, 11, 11, 11, 11, 11, 11, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:12,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:12,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:12,611 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:12,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -769042422, now seen corresponding path program 3 times [2022-01-10 06:38:12,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:12,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23731037] [2022-01-10 06:38:12,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:12,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:12,613 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:12,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:38:12,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 06:38:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:38:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2022-01-10 06:38:13,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 413 proven. 1 refuted. 0 times theorem prover too weak. 2867 trivial. 0 not checked. [2022-01-10 06:38:14,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:14,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23731037] [2022-01-10 06:38:14,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23731037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:14,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:14,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 06:38:14,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922419173] [2022-01-10 06:38:14,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:14,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:38:14,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:38:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:38:14,221 INFO L87 Difference]: Start difference. First operand 215 states and 593 transitions. Second operand has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:38:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:14,412 INFO L93 Difference]: Finished difference Result 543 states and 2182 transitions. [2022-01-10 06:38:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 320 [2022-01-10 06:38:14,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:14,439 INFO L225 Difference]: With dead ends: 543 [2022-01-10 06:38:14,440 INFO L226 Difference]: Without dead ends: 331 [2022-01-10 06:38:14,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:14,446 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:14,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 181 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-10 06:38:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 225. [2022-01-10 06:38:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 127 states have (on average 1.125984251968504) internal successors, (143), 130 states have internal predecessors, (143), 50 states have call successors, (50), 15 states have call predecessors, (50), 47 states have return successors, (443), 79 states have call predecessors, (443), 50 states have call successors, (443) [2022-01-10 06:38:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 636 transitions. [2022-01-10 06:38:14,490 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 636 transitions. Word has length 320 [2022-01-10 06:38:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:14,490 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 636 transitions. [2022-01-10 06:38:14,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:38:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 636 transitions. [2022-01-10 06:38:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-10 06:38:14,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:14,498 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 20, 19, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:14,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:14,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:14,706 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:14,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:14,707 INFO L85 PathProgramCache]: Analyzing trace with hash 279871242, now seen corresponding path program 4 times [2022-01-10 06:38:14,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:14,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015427789] [2022-01-10 06:38:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:14,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:14,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:14,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:38:14,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:14,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:38:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 74 proven. 805 refuted. 0 times theorem prover too weak. 3434 trivial. 0 not checked. [2022-01-10 06:38:15,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 74 proven. 826 refuted. 0 times theorem prover too weak. 3413 trivial. 0 not checked. [2022-01-10 06:38:17,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015427789] [2022-01-10 06:38:17,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015427789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:17,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:17,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2022-01-10 06:38:17,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691112552] [2022-01-10 06:38:17,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:17,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:17,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:17,595 INFO L87 Difference]: Start difference. First operand 225 states and 636 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:19,035 INFO L93 Difference]: Finished difference Result 683 states and 3001 transitions. [2022-01-10 06:38:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:38:19,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 368 [2022-01-10 06:38:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:19,044 INFO L225 Difference]: With dead ends: 683 [2022-01-10 06:38:19,044 INFO L226 Difference]: Without dead ends: 461 [2022-01-10 06:38:19,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 06:38:19,050 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:19,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 253 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 06:38:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-10 06:38:19,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 420. [2022-01-10 06:38:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 238 states have (on average 1.1218487394957983) internal successors, (267), 243 states have internal predecessors, (267), 88 states have call successors, (88), 26 states have call predecessors, (88), 93 states have return successors, (1202), 150 states have call predecessors, (1202), 88 states have call successors, (1202) [2022-01-10 06:38:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1557 transitions. [2022-01-10 06:38:19,113 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1557 transitions. Word has length 368 [2022-01-10 06:38:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1557 transitions. [2022-01-10 06:38:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1557 transitions. [2022-01-10 06:38:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-10 06:38:19,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:19,126 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 18, 17, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 10, 10, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:19,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:19,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:19,342 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash 412199969, now seen corresponding path program 5 times [2022-01-10 06:38:19,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:19,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446435554] [2022-01-10 06:38:19,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:38:19,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:19,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:19,344 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:19,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:38:19,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 06:38:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:19,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3712 backedges. 1047 proven. 6 refuted. 0 times theorem prover too weak. 2659 trivial. 0 not checked. [2022-01-10 06:38:19,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3712 backedges. 200 proven. 497 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-01-10 06:38:21,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:21,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446435554] [2022-01-10 06:38:21,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446435554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:21,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:21,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-10 06:38:21,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800117296] [2022-01-10 06:38:21,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:21,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:38:21,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:38:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:21,207 INFO L87 Difference]: Start difference. First operand 420 states and 1557 transitions. Second operand has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 06:38:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:21,358 INFO L93 Difference]: Finished difference Result 832 states and 4034 transitions. [2022-01-10 06:38:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:21,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 342 [2022-01-10 06:38:21,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:21,367 INFO L225 Difference]: With dead ends: 832 [2022-01-10 06:38:21,367 INFO L226 Difference]: Without dead ends: 415 [2022-01-10 06:38:21,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 672 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:21,376 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:21,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 106 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-10 06:38:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 407. [2022-01-10 06:38:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 230 states have (on average 1.126086956521739) internal successors, (259), 235 states have internal predecessors, (259), 87 states have call successors, (87), 26 states have call predecessors, (87), 89 states have return successors, (1121), 145 states have call predecessors, (1121), 87 states have call successors, (1121) [2022-01-10 06:38:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1467 transitions. [2022-01-10 06:38:21,443 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1467 transitions. Word has length 342 [2022-01-10 06:38:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:21,444 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1467 transitions. [2022-01-10 06:38:21,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 06:38:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1467 transitions. [2022-01-10 06:38:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-01-10 06:38:21,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:21,484 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 30, 28, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 20, 19, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:21,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:21,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:21,691 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1052569980, now seen corresponding path program 6 times [2022-01-10 06:38:21,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:21,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377511440] [2022-01-10 06:38:21,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:21,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:21,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:21,694 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:21,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:38:21,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-10 06:38:21,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:21,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:38:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11685 backedges. 2105 proven. 0 refuted. 0 times theorem prover too weak. 9580 trivial. 0 not checked. [2022-01-10 06:38:22,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:38:22,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:22,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377511440] [2022-01-10 06:38:22,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377511440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:38:22,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:38:22,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:38:22,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881623101] [2022-01-10 06:38:22,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:38:22,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:38:22,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:38:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:38:22,560 INFO L87 Difference]: Start difference. First operand 407 states and 1467 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 2 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:38:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:22,648 INFO L93 Difference]: Finished difference Result 661 states and 2518 transitions. [2022-01-10 06:38:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:38:22,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 2 states have call predecessors, (14), 4 states have call successors, (14) Word has length 596 [2022-01-10 06:38:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:22,651 INFO L225 Difference]: With dead ends: 661 [2022-01-10 06:38:22,651 INFO L226 Difference]: Without dead ends: 238 [2022-01-10 06:38:22,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:22,657 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:22,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 75 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-10 06:38:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 215. [2022-01-10 06:38:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 133 states have internal predecessors, (147), 36 states have call successors, (36), 17 states have call predecessors, (36), 48 states have return successors, (272), 64 states have call predecessors, (272), 36 states have call successors, (272) [2022-01-10 06:38:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 455 transitions. [2022-01-10 06:38:22,679 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 455 transitions. Word has length 596 [2022-01-10 06:38:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:22,679 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 455 transitions. [2022-01-10 06:38:22,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 2 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-10 06:38:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 455 transitions. [2022-01-10 06:38:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-10 06:38:22,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:22,682 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 13, 12, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:22,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:22,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:22,890 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:22,890 INFO L85 PathProgramCache]: Analyzing trace with hash 136385706, now seen corresponding path program 7 times [2022-01-10 06:38:22,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:22,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858484358] [2022-01-10 06:38:22,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:22,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:22,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:22,892 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:22,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:38:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:38:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1839 backedges. 136 proven. 413 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2022-01-10 06:38:23,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1839 backedges. 136 proven. 437 refuted. 0 times theorem prover too weak. 1266 trivial. 0 not checked. [2022-01-10 06:38:24,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:24,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858484358] [2022-01-10 06:38:24,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858484358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:24,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:24,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2022-01-10 06:38:24,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963236087] [2022-01-10 06:38:24,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:24,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:24,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:24,574 INFO L87 Difference]: Start difference. First operand 215 states and 455 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:24,953 INFO L93 Difference]: Finished difference Result 460 states and 1305 transitions. [2022-01-10 06:38:24,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:38:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 244 [2022-01-10 06:38:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:24,960 INFO L225 Difference]: With dead ends: 460 [2022-01-10 06:38:24,960 INFO L226 Difference]: Without dead ends: 248 [2022-01-10 06:38:24,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 467 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:38:24,963 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:24,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 352 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-10 06:38:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2022-01-10 06:38:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 147 states have internal predecessors, (161), 41 states have call successors, (41), 17 states have call predecessors, (41), 55 states have return successors, (373), 76 states have call predecessors, (373), 41 states have call successors, (373) [2022-01-10 06:38:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 575 transitions. [2022-01-10 06:38:24,985 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 575 transitions. Word has length 244 [2022-01-10 06:38:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:24,986 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 575 transitions. [2022-01-10 06:38:24,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 575 transitions. [2022-01-10 06:38:24,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-10 06:38:24,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:24,990 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 24, 24, 18, 17, 15, 15, 15, 15, 15, 15, 13, 12, 12, 12, 12, 12, 12, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:25,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:25,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:25,201 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash -178847892, now seen corresponding path program 8 times [2022-01-10 06:38:25,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:25,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26901359] [2022-01-10 06:38:25,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:25,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:25,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:25,203 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:25,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:38:25,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:25,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 122 proven. 786 refuted. 0 times theorem prover too weak. 2858 trivial. 0 not checked. [2022-01-10 06:38:25,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3766 backedges. 122 proven. 816 refuted. 0 times theorem prover too weak. 2828 trivial. 0 not checked. [2022-01-10 06:38:28,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:28,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26901359] [2022-01-10 06:38:28,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26901359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:28,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:28,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2022-01-10 06:38:28,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756817780] [2022-01-10 06:38:28,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:28,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 06:38:28,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 06:38:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:38:28,190 INFO L87 Difference]: Start difference. First operand 241 states and 575 transitions. Second operand has 22 states, 20 states have (on average 3.25) internal successors, (65), 22 states have internal predecessors, (65), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:30,254 INFO L93 Difference]: Finished difference Result 649 states and 2217 transitions. [2022-01-10 06:38:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-10 06:38:30,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.25) internal successors, (65), 22 states have internal predecessors, (65), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 342 [2022-01-10 06:38:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:30,260 INFO L225 Difference]: With dead ends: 649 [2022-01-10 06:38:30,260 INFO L226 Difference]: Without dead ends: 407 [2022-01-10 06:38:30,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=1987, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 06:38:30,264 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 124 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:30,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 286 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 06:38:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-10 06:38:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 384. [2022-01-10 06:38:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 236 states have (on average 1.1440677966101696) internal successors, (270), 235 states have internal predecessors, (270), 64 states have call successors, (64), 35 states have call predecessors, (64), 83 states have return successors, (650), 113 states have call predecessors, (650), 64 states have call successors, (650) [2022-01-10 06:38:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 984 transitions. [2022-01-10 06:38:30,307 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 984 transitions. Word has length 342 [2022-01-10 06:38:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:30,307 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 984 transitions. [2022-01-10 06:38:30,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.25) internal successors, (65), 22 states have internal predecessors, (65), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 984 transitions. [2022-01-10 06:38:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-10 06:38:30,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:30,314 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 22, 21, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:30,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:30,526 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1374344107, now seen corresponding path program 9 times [2022-01-10 06:38:30,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:30,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219115434] [2022-01-10 06:38:30,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:30,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:30,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:30,528 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:30,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:38:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:38:30,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:30,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4671 backedges. 742 proven. 3 refuted. 0 times theorem prover too weak. 3926 trivial. 0 not checked. [2022-01-10 06:38:31,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4671 backedges. 627 proven. 13 refuted. 0 times theorem prover too weak. 4031 trivial. 0 not checked. [2022-01-10 06:38:32,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:32,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219115434] [2022-01-10 06:38:32,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219115434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:32,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:32,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:38:32,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994372363] [2022-01-10 06:38:32,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:32,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:32,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:32,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:32,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:32,450 INFO L87 Difference]: Start difference. First operand 384 states and 984 transitions. Second operand has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2022-01-10 06:38:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:32,658 INFO L93 Difference]: Finished difference Result 817 states and 2828 transitions. [2022-01-10 06:38:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:38:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) Word has length 383 [2022-01-10 06:38:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:32,663 INFO L225 Difference]: With dead ends: 817 [2022-01-10 06:38:32,663 INFO L226 Difference]: Without dead ends: 313 [2022-01-10 06:38:32,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:38:32,669 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:32,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 126 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-10 06:38:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 296. [2022-01-10 06:38:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 181 states have (on average 1.1160220994475138) internal successors, (202), 179 states have internal predecessors, (202), 51 states have call successors, (51), 27 states have call predecessors, (51), 63 states have return successors, (427), 89 states have call predecessors, (427), 51 states have call successors, (427) [2022-01-10 06:38:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 680 transitions. [2022-01-10 06:38:32,698 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 680 transitions. Word has length 383 [2022-01-10 06:38:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 680 transitions. [2022-01-10 06:38:32,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (17), 6 states have call predecessors, (17), 8 states have call successors, (17) [2022-01-10 06:38:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 680 transitions. [2022-01-10 06:38:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-01-10 06:38:32,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:32,703 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 17, 17, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 11, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:32,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:32,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:32,912 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:32,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:32,912 INFO L85 PathProgramCache]: Analyzing trace with hash 845720481, now seen corresponding path program 10 times [2022-01-10 06:38:32,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:32,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186730548] [2022-01-10 06:38:32,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:32,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:32,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:32,914 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:32,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:38:33,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:33,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3954 backedges. 216 proven. 737 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2022-01-10 06:38:33,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3954 backedges. 216 proven. 770 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-01-10 06:38:35,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186730548] [2022-01-10 06:38:35,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186730548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:35,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:35,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2022-01-10 06:38:35,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508669851] [2022-01-10 06:38:35,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:35,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 06:38:35,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 06:38:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:38:35,338 INFO L87 Difference]: Start difference. First operand 296 states and 680 transitions. Second operand has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:35,765 INFO L93 Difference]: Finished difference Result 626 states and 1877 transitions. [2022-01-10 06:38:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:38:35,767 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 352 [2022-01-10 06:38:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:35,772 INFO L225 Difference]: With dead ends: 626 [2022-01-10 06:38:35,772 INFO L226 Difference]: Without dead ends: 333 [2022-01-10 06:38:35,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 679 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:38:35,775 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 33 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:35,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 401 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-10 06:38:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 327. [2022-01-10 06:38:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 195 states have internal predecessors, (218), 58 states have call successors, (58), 27 states have call predecessors, (58), 71 states have return successors, (584), 104 states have call predecessors, (584), 58 states have call successors, (584) [2022-01-10 06:38:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 860 transitions. [2022-01-10 06:38:35,811 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 860 transitions. Word has length 352 [2022-01-10 06:38:35,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:35,811 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 860 transitions. [2022-01-10 06:38:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 860 transitions. [2022-01-10 06:38:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-10 06:38:35,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:35,817 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 22, 22, 16, 16, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:35,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:36,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:36,028 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1387496753, now seen corresponding path program 11 times [2022-01-10 06:38:36,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536948005] [2022-01-10 06:38:36,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:38:36,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:36,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:36,030 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:36,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:38:36,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 06:38:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2967 backedges. 975 proven. 11 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2022-01-10 06:38:36,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2967 backedges. 241 proven. 334 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2022-01-10 06:38:37,675 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:37,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536948005] [2022-01-10 06:38:37,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536948005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:37,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:37,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2022-01-10 06:38:37,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488835604] [2022-01-10 06:38:37,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:37,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:38:37,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:38:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:37,677 INFO L87 Difference]: Start difference. First operand 327 states and 860 transitions. Second operand has 15 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 13 states have internal predecessors, (52), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (20), 5 states have call predecessors, (20), 8 states have call successors, (20) [2022-01-10 06:38:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:37,823 INFO L93 Difference]: Finished difference Result 536 states and 1538 transitions. [2022-01-10 06:38:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:38:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 13 states have internal predecessors, (52), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (20), 5 states have call predecessors, (20), 8 states have call successors, (20) Word has length 306 [2022-01-10 06:38:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:37,826 INFO L225 Difference]: With dead ends: 536 [2022-01-10 06:38:37,826 INFO L226 Difference]: Without dead ends: 194 [2022-01-10 06:38:37,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:37,830 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:37,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 122 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-10 06:38:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 180. [2022-01-10 06:38:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 109 states have (on average 1.110091743119266) internal successors, (121), 110 states have internal predecessors, (121), 33 states have call successors, (33), 15 states have call predecessors, (33), 37 states have return successors, (171), 54 states have call predecessors, (171), 33 states have call successors, (171) [2022-01-10 06:38:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 325 transitions. [2022-01-10 06:38:37,842 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 325 transitions. Word has length 306 [2022-01-10 06:38:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:37,843 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 325 transitions. [2022-01-10 06:38:37,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 13 states have internal predecessors, (52), 8 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (20), 5 states have call predecessors, (20), 8 states have call successors, (20) [2022-01-10 06:38:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 325 transitions. [2022-01-10 06:38:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2022-01-10 06:38:37,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:37,865 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 54, 54, 54, 45, 33, 33, 33, 33, 33, 33, 27, 27, 27, 27, 27, 27, 27, 13, 12, 9, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:37,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:38,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:38,065 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1670187771, now seen corresponding path program 12 times [2022-01-10 06:38:38,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:38,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471900204] [2022-01-10 06:38:38,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:38,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:38,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:38,067 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:38,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:38:38,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-10 06:38:38,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:38,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19626 backedges. 5406 proven. 21 refuted. 0 times theorem prover too weak. 14199 trivial. 0 not checked. [2022-01-10 06:38:39,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19626 backedges. 1942 proven. 171 refuted. 0 times theorem prover too weak. 17513 trivial. 0 not checked. [2022-01-10 06:38:42,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:42,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471900204] [2022-01-10 06:38:42,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471900204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:42,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:42,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2022-01-10 06:38:42,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135524470] [2022-01-10 06:38:42,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:42,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:38:42,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:42,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:38:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:42,267 INFO L87 Difference]: Start difference. First operand 180 states and 325 transitions. Second operand has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 9 states have call successors, (19), 2 states have call predecessors, (19), 6 states have return successors, (25), 7 states have call predecessors, (25), 9 states have call successors, (25) [2022-01-10 06:38:42,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:42,519 INFO L93 Difference]: Finished difference Result 357 states and 729 transitions. [2022-01-10 06:38:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:38:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 9 states have call successors, (19), 2 states have call predecessors, (19), 6 states have return successors, (25), 7 states have call predecessors, (25), 9 states have call successors, (25) Word has length 769 [2022-01-10 06:38:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:42,522 INFO L225 Difference]: With dead ends: 357 [2022-01-10 06:38:42,522 INFO L226 Difference]: Without dead ends: 180 [2022-01-10 06:38:42,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1544 GetRequests, 1522 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:38:42,524 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:42,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 129 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-10 06:38:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-01-10 06:38:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 109 states have (on average 1.110091743119266) internal successors, (121), 110 states have internal predecessors, (121), 33 states have call successors, (33), 15 states have call predecessors, (33), 37 states have return successors, (166), 54 states have call predecessors, (166), 33 states have call successors, (166) [2022-01-10 06:38:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 320 transitions. [2022-01-10 06:38:42,536 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 320 transitions. Word has length 769 [2022-01-10 06:38:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:42,537 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 320 transitions. [2022-01-10 06:38:42,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 9 states have call successors, (19), 2 states have call predecessors, (19), 6 states have return successors, (25), 7 states have call predecessors, (25), 9 states have call successors, (25) [2022-01-10 06:38:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 320 transitions. [2022-01-10 06:38:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2022-01-10 06:38:42,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:42,542 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 51, 51, 42, 39, 28, 28, 28, 28, 28, 28, 25, 25, 25, 25, 25, 25, 17, 14, 14, 9, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:42,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:42,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:42,752 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash -598890474, now seen corresponding path program 13 times [2022-01-10 06:38:42,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:42,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339427839] [2022-01-10 06:38:42,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:42,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:42,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:42,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:42,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:38:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:43,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:38:43,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14896 backedges. 343 proven. 1892 refuted. 0 times theorem prover too weak. 12661 trivial. 0 not checked. [2022-01-10 06:38:43,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14896 backedges. 343 proven. 1936 refuted. 0 times theorem prover too weak. 12617 trivial. 0 not checked. [2022-01-10 06:38:46,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:46,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339427839] [2022-01-10 06:38:46,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339427839] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:46,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:46,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2022-01-10 06:38:46,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982176280] [2022-01-10 06:38:46,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:46,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:38:46,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:38:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:38:46,668 INFO L87 Difference]: Start difference. First operand 180 states and 320 transitions. Second operand has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2022-01-10 06:38:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:47,121 INFO L93 Difference]: Finished difference Result 380 states and 869 transitions. [2022-01-10 06:38:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:38:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) Word has length 674 [2022-01-10 06:38:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:47,124 INFO L225 Difference]: With dead ends: 380 [2022-01-10 06:38:47,124 INFO L226 Difference]: Without dead ends: 203 [2022-01-10 06:38:47,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1355 GetRequests, 1323 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:38:47,127 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:47,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 434 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-10 06:38:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2022-01-10 06:38:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 117 states have (on average 1.1025641025641026) internal successors, (129), 118 states have internal predecessors, (129), 37 states have call successors, (37), 15 states have call predecessors, (37), 41 states have return successors, (217), 62 states have call predecessors, (217), 37 states have call successors, (217) [2022-01-10 06:38:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 383 transitions. [2022-01-10 06:38:47,144 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 383 transitions. Word has length 674 [2022-01-10 06:38:47,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:47,144 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 383 transitions. [2022-01-10 06:38:47,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2022-01-10 06:38:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 383 transitions. [2022-01-10 06:38:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2022-01-10 06:38:47,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:47,153 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 71, 71, 59, 56, 40, 40, 40, 40, 40, 40, 35, 35, 35, 35, 35, 35, 24, 21, 19, 12, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:47,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:47,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:47,374 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:47,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash 611486579, now seen corresponding path program 14 times [2022-01-10 06:38:47,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:47,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831923646] [2022-01-10 06:38:47,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:47,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:47,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:47,377 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:47,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:38:47,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:47,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 29956 backedges. 489 proven. 2368 refuted. 0 times theorem prover too weak. 27099 trivial. 0 not checked. [2022-01-10 06:38:49,016 INFO L328 TraceCheckSpWp]: Computing backward predicates...