/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:19:21,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:19:21,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:19:21,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:19:21,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:19:21,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:19:21,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:19:21,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:19:21,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:19:21,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:19:21,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:19:21,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:19:21,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:19:21,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:19:21,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:19:21,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:19:21,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:19:21,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:19:21,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:19:21,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:19:21,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:19:21,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:19:21,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:19:21,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:19:21,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 18:19:21,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:19:21,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:19:21,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:19:21,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:19:21,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:19:21,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:19:21,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:19:21,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:19:21,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:19:21,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:19:21,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:19:21,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:19:21,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:19:21,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:19:21,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:19:21,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:19:21,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:19:21,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:19:21,987 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:19:21,987 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:19:22,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:19:22,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:19:22,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:19:22,210 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:19:22,210 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:19:22,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2022-01-10 18:19:22,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2fd864d5/816fefb1142c4d4fa236bb60b70e1bee/FLAG9d4315480 [2022-01-10 18:19:22,571 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:19:22,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2022-01-10 18:19:22,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2fd864d5/816fefb1142c4d4fa236bb60b70e1bee/FLAG9d4315480 [2022-01-10 18:19:23,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2fd864d5/816fefb1142c4d4fa236bb60b70e1bee [2022-01-10 18:19:23,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:19:23,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:19:23,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:19:23,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:19:23,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:19:23,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb0dc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23, skipping insertion in model container [2022-01-10 18:19:23,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:19:23,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:19:23,216 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/Ackermann04.c[1166,1179] [2022-01-10 18:19:23,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:19:23,228 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:19:23,244 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/Ackermann04.c[1166,1179] [2022-01-10 18:19:23,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:19:23,255 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:19:23,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23 WrapperNode [2022-01-10 18:19:23,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:19:23,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:19:23,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:19:23,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:19:23,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,281 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-01-10 18:19:23,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:19:23,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:19:23,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:19:23,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:19:23,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,308 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:19:23,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:19:23,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:19:23,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:19:23,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:19:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:23,342 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 18:19:23,354 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 18:19:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:19:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:19:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:19:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:19:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-01-10 18:19:23,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-01-10 18:19:23,424 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:19:23,425 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:19:23,564 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:19:23,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:19:23,568 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:19:23,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:23 BoogieIcfgContainer [2022-01-10 18:19:23,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:19:23,570 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:19:23,570 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:19:23,588 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:19:23,591 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:23" (1/1) ... [2022-01-10 18:19:23,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:19:23 BasicIcfg [2022-01-10 18:19:23,670 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:19:23,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:19:23,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:19:23,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:19:23,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:19:23" (1/4) ... [2022-01-10 18:19:23,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b0885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:23, skipping insertion in model container [2022-01-10 18:19:23,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:19:23" (2/4) ... [2022-01-10 18:19:23,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b0885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:19:23, skipping insertion in model container [2022-01-10 18:19:23,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:19:23" (3/4) ... [2022-01-10 18:19:23,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b0885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:19:23, skipping insertion in model container [2022-01-10 18:19:23,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:19:23" (4/4) ... [2022-01-10 18:19:23,676 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.cTransformedIcfg [2022-01-10 18:19:23,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:19:23,693 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:19:23,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:19:23,750 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 18:19:23,750 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:19:23,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 18:19:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 18:19:23,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:23,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:23,763 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:23,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1248781538, now seen corresponding path program 1 times [2022-01-10 18:19:23,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:23,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461100493] [2022-01-10 18:19:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:23,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,003 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 18:19:24,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461100493] [2022-01-10 18:19:24,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461100493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:19:24,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:19:24,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 18:19:24,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149963156] [2022-01-10 18:19:24,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:19:24,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 18:19:24,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 18:19:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:19:24,037 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 18:19:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:24,132 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-01-10 18:19:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 18:19:24,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2022-01-10 18:19:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:24,141 INFO L225 Difference]: With dead ends: 36 [2022-01-10 18:19:24,141 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 18:19:24,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:19:24,147 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:24,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 67 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:19:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 18:19:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 18:19:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 18:19:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-01-10 18:19:24,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2022-01-10 18:19:24,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:24,183 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-01-10 18:19:24,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 18:19:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-01-10 18:19:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 18:19:24,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:24,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:24,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:19:24,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1675309908, now seen corresponding path program 1 times [2022-01-10 18:19:24,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:24,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600992569] [2022-01-10 18:19:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:24,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:19:24,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:24,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600992569] [2022-01-10 18:19:24,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600992569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:24,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433548460] [2022-01-10 18:19:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:24,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:24,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:24,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:24,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:19:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:24,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 18:19:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:19:24,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:19:24,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433548460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:24,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:24,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 6] total 16 [2022-01-10 18:19:24,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987308518] [2022-01-10 18:19:24,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:24,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 18:19:24,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 18:19:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-10 18:19:24,873 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 18:19:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:25,061 INFO L93 Difference]: Finished difference Result 59 states and 109 transitions. [2022-01-10 18:19:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:19:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 19 [2022-01-10 18:19:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:25,063 INFO L225 Difference]: With dead ends: 59 [2022-01-10 18:19:25,063 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 18:19:25,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-10 18:19:25,065 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:25,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 60 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:19:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 18:19:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-10 18:19:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 8 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (27), 10 states have call predecessors, (27), 8 states have call successors, (27) [2022-01-10 18:19:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 62 transitions. [2022-01-10 18:19:25,073 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 62 transitions. Word has length 19 [2022-01-10 18:19:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:25,073 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 62 transitions. [2022-01-10 18:19:25,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 18:19:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 62 transitions. [2022-01-10 18:19:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 18:19:25,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:25,075 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:25,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:25,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:25,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash -293896410, now seen corresponding path program 1 times [2022-01-10 18:19:25,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:25,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587463619] [2022-01-10 18:19:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:25,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 18:19:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 18:19:25,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:25,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587463619] [2022-01-10 18:19:25,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587463619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:25,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115281740] [2022-01-10 18:19:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:25,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:25,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:25,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:19:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:25,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 18:19:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-10 18:19:25,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 18:19:26,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115281740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:26,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:26,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 18 [2022-01-10 18:19:26,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070389982] [2022-01-10 18:19:26,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:26,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 18:19:26,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 18:19:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-10 18:19:26,273 INFO L87 Difference]: Start difference. First operand 37 states and 62 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-10 18:19:26,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:26,428 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2022-01-10 18:19:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:19:26,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) Word has length 43 [2022-01-10 18:19:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:26,433 INFO L225 Difference]: With dead ends: 80 [2022-01-10 18:19:26,433 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 18:19:26,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-10 18:19:26,438 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:26,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 105 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:19:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 18:19:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 18:19:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-01-10 18:19:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 73 transitions. [2022-01-10 18:19:26,457 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 73 transitions. Word has length 43 [2022-01-10 18:19:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:26,457 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 73 transitions. [2022-01-10 18:19:26,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2022-01-10 18:19:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 73 transitions. [2022-01-10 18:19:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 18:19:26,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:26,463 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:26,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:26,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-10 18:19:26,664 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2419939, now seen corresponding path program 2 times [2022-01-10 18:19:26,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:26,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815502165] [2022-01-10 18:19:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:26,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-10 18:19:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 96 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-10 18:19:27,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:27,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815502165] [2022-01-10 18:19:27,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815502165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:27,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827219322] [2022-01-10 18:19:27,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:19:27,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:27,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:27,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:19:27,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:19:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 18:19:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 97 proven. 19 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-10 18:19:27,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 102 proven. 14 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-01-10 18:19:27,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827219322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:27,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:27,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-10 18:19:27,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725448889] [2022-01-10 18:19:27,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:27,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 18:19:27,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:27,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 18:19:27,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:19:27,747 INFO L87 Difference]: Start difference. First operand 46 states and 73 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (18), 13 states have call predecessors, (18), 6 states have call successors, (18) [2022-01-10 18:19:28,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:28,560 INFO L93 Difference]: Finished difference Result 171 states and 503 transitions. [2022-01-10 18:19:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-10 18:19:28,561 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (18), 13 states have call predecessors, (18), 6 states have call successors, (18) Word has length 76 [2022-01-10 18:19:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:28,566 INFO L225 Difference]: With dead ends: 171 [2022-01-10 18:19:28,566 INFO L226 Difference]: Without dead ends: 130 [2022-01-10 18:19:28,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=723, Invalid=2817, Unknown=0, NotChecked=0, Total=3540 [2022-01-10 18:19:28,569 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:28,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 158 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:19:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-10 18:19:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 75. [2022-01-10 18:19:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 47 states have internal predecessors, (49), 13 states have call successors, (13), 3 states have call predecessors, (13), 16 states have return successors, (114), 24 states have call predecessors, (114), 13 states have call successors, (114) [2022-01-10 18:19:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 176 transitions. [2022-01-10 18:19:28,609 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 176 transitions. Word has length 76 [2022-01-10 18:19:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:28,610 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 176 transitions. [2022-01-10 18:19:28,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 16 states have internal predecessors, (48), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (18), 13 states have call predecessors, (18), 6 states have call successors, (18) [2022-01-10 18:19:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 176 transitions. [2022-01-10 18:19:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 18:19:28,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:28,612 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 16, 10, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:28,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:28,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:28,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1587575971, now seen corresponding path program 3 times [2022-01-10 18:19:28,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:28,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642003891] [2022-01-10 18:19:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:28,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 18:19:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-10 18:19:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 119 proven. 453 refuted. 0 times theorem prover too weak. 998 trivial. 0 not checked. [2022-01-10 18:19:29,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:29,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642003891] [2022-01-10 18:19:29,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642003891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:29,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786026946] [2022-01-10 18:19:29,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:19:29,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:29,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:29,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:29,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:19:29,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-10 18:19:29,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 18:19:29,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:19:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 626 proven. 27 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2022-01-10 18:19:29,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:19:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 537 proven. 59 refuted. 0 times theorem prover too weak. 974 trivial. 0 not checked. [2022-01-10 18:19:31,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786026946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:19:31,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:19:31,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 12] total 29 [2022-01-10 18:19:31,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498599141] [2022-01-10 18:19:31,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:19:31,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 18:19:31,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:19:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 18:19:31,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-01-10 18:19:31,244 INFO L87 Difference]: Start difference. First operand 75 states and 176 transitions. Second operand has 29 states, 25 states have (on average 2.68) internal successors, (67), 22 states have internal predecessors, (67), 15 states have call successors, (20), 2 states have call predecessors, (20), 13 states have return successors, (29), 15 states have call predecessors, (29), 15 states have call successors, (29) [2022-01-10 18:19:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:19:34,128 INFO L93 Difference]: Finished difference Result 277 states and 1278 transitions. [2022-01-10 18:19:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-10 18:19:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.68) internal successors, (67), 22 states have internal predecessors, (67), 15 states have call successors, (20), 2 states have call predecessors, (20), 13 states have return successors, (29), 15 states have call predecessors, (29), 15 states have call successors, (29) Word has length 169 [2022-01-10 18:19:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:19:34,133 INFO L225 Difference]: With dead ends: 277 [2022-01-10 18:19:34,133 INFO L226 Difference]: Without dead ends: 205 [2022-01-10 18:19:34,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 374 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1103, Invalid=5539, Unknown=0, NotChecked=0, Total=6642 [2022-01-10 18:19:34,137 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:19:34,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 340 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 18:19:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-10 18:19:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 179. [2022-01-10 18:19:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 28 states have call successors, (28), 6 states have call predecessors, (28), 43 states have return successors, (501), 64 states have call predecessors, (501), 28 states have call successors, (501) [2022-01-10 18:19:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 640 transitions. [2022-01-10 18:19:34,204 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 640 transitions. Word has length 169 [2022-01-10 18:19:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:19:34,205 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 640 transitions. [2022-01-10 18:19:34,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.68) internal successors, (67), 22 states have internal predecessors, (67), 15 states have call successors, (20), 2 states have call predecessors, (20), 13 states have return successors, (29), 15 states have call predecessors, (29), 15 states have call successors, (29) [2022-01-10 18:19:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 640 transitions. [2022-01-10 18:19:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-10 18:19:34,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:19:34,208 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:19:34,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 18:19:34,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:34,422 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:19:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:19:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1233577873, now seen corresponding path program 4 times [2022-01-10 18:19:34,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:19:34,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381754476] [2022-01-10 18:19:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:19:34,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:19:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:19:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:19:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:19:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 18:19:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-10 18:19:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:19:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:19:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 178 proven. 83 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-01-10 18:19:34,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:19:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381754476] [2022-01-10 18:19:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381754476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:19:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525013635] [2022-01-10 18:19:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 18:19:34,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:19:34,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:19:34,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:19:34,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:19:35,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 18:19:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:19:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 78 conjunts are in the unsatisfiable core [2022-01-10 18:19:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:20:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 92 proven. 179 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-10 18:20:17,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:20:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 188 proven. 74 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-01-10 18:20:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525013635] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:20:18,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:20:18,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 19] total 47 [2022-01-10 18:20:18,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066357658] [2022-01-10 18:20:18,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:20:18,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 18:20:18,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:20:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 18:20:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 18:20:18,836 INFO L87 Difference]: Start difference. First operand 179 states and 640 transitions. Second operand has 47 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 23 states have call predecessors, (31), 12 states have call successors, (31) [2022-01-10 18:20:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:20:33,997 INFO L93 Difference]: Finished difference Result 1257 states and 8843 transitions. [2022-01-10 18:20:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-01-10 18:20:34,019 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 23 states have call predecessors, (31), 12 states have call successors, (31) Word has length 100 [2022-01-10 18:20:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:20:34,090 INFO L225 Difference]: With dead ends: 1257 [2022-01-10 18:20:34,090 INFO L226 Difference]: Without dead ends: 1083 [2022-01-10 18:20:34,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 196 SyntacticMatches, 5 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19685 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=6808, Invalid=48182, Unknown=0, NotChecked=0, Total=54990 [2022-01-10 18:20:34,144 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 2848 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 2848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:20:34,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 381 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 2848 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 18:20:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-01-10 18:20:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 280. [2022-01-10 18:20:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 169 states have (on average 1.0236686390532543) internal successors, (173), 170 states have internal predecessors, (173), 36 states have call successors, (36), 6 states have call predecessors, (36), 74 states have return successors, (1218), 103 states have call predecessors, (1218), 36 states have call successors, (1218) [2022-01-10 18:20:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 1427 transitions. [2022-01-10 18:20:34,460 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 1427 transitions. Word has length 100 [2022-01-10 18:20:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:20:34,462 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 1427 transitions. [2022-01-10 18:20:34,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 23 states have call predecessors, (31), 12 states have call successors, (31) [2022-01-10 18:20:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 1427 transitions. [2022-01-10 18:20:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 18:20:34,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:20:34,476 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:20:34,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 18:20:34,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:20:34,693 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:20:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:20:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1955319389, now seen corresponding path program 5 times [2022-01-10 18:20:34,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:20:34,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221901735] [2022-01-10 18:20:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:20:34,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:20:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 18:20:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:34,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:20:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:20:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:20:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 18:20:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-10 18:20:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:20:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 18:20:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 18:20:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:20:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 128 proven. 294 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-01-10 18:20:35,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:20:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221901735] [2022-01-10 18:20:35,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221901735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:20:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053372475] [2022-01-10 18:20:35,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 18:20:35,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:20:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:20:35,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:20:35,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:20:35,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-10 18:20:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:20:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-10 18:20:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates...