/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_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:29:10,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:29:10,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:29:11,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:29:11,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:29:11,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:29:11,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:29:11,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:29:11,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:29:11,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:29:11,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:29:11,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:29:11,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:29:11,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:29:11,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:29:11,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:29:11,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:29:11,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:29:11,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:29:11,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:29:11,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:29:11,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:29:11,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:29:11,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:29:11,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:29:11,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:29:11,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:29:11,051 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:29:11,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:29:11,052 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:29:11,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:29:11,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:29:11,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:29:11,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:29:11,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:29:11,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:29:11,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:29:11,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:29:11,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:29:11,058 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:29:11,059 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:29:11,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:29:11,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:29:11,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:29:11,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:29:11,255 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:29:11,257 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2022-01-10 12:29:11,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318fff3b4/3a0a1037b8fa4f57bc8eaaa51e5eaf52/FLAG55cbcf7bd [2022-01-10 12:29:11,667 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:29:11,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2022-01-10 12:29:11,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318fff3b4/3a0a1037b8fa4f57bc8eaaa51e5eaf52/FLAG55cbcf7bd [2022-01-10 12:29:11,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/318fff3b4/3a0a1037b8fa4f57bc8eaaa51e5eaf52 [2022-01-10 12:29:11,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:29:11,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:29:11,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:29:11,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:29:11,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:29:11,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2e9d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11, skipping insertion in model container [2022-01-10 12:29:11,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:29:11,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:29:11,890 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/Ackermann03.c[1168,1181] [2022-01-10 12:29:11,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:29:11,898 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:29:11,909 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/Ackermann03.c[1168,1181] [2022-01-10 12:29:11,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:29:11,918 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:29:11,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11 WrapperNode [2022-01-10 12:29:11,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:29:11,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:29:11,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:29:11,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:29:11,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,939 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-01-10 12:29:11,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:29:11,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:29:11,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:29:11,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:29:11,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:29:11,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:29:11,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:29:11,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:29:11,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (1/1) ... [2022-01-10 12:29:11,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:29:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:11,976 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 12:29:11,982 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 12:29:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:29:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:29:12,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:29:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:29:12,001 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-01-10 12:29:12,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-01-10 12:29:12,049 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:29:12,050 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:29:12,120 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:29:12,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:29:12,124 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:29:12,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:29:12 BoogieIcfgContainer [2022-01-10 12:29:12,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:29:12,126 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:29:12,126 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:29:12,127 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:29:12,129 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:29:12" (1/1) ... [2022-01-10 12:29:12,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:29:12 BasicIcfg [2022-01-10 12:29:12,175 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:29:12,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:29:12,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:29:12,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:29:12,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:29:11" (1/4) ... [2022-01-10 12:29:12,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4467a6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:29:12, skipping insertion in model container [2022-01-10 12:29:12,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:29:11" (2/4) ... [2022-01-10 12:29:12,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4467a6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:29:12, skipping insertion in model container [2022-01-10 12:29:12,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:29:12" (3/4) ... [2022-01-10 12:29:12,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4467a6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:29:12, skipping insertion in model container [2022-01-10 12:29:12,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:29:12" (4/4) ... [2022-01-10 12:29:12,185 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann03.cTransformedIcfg [2022-01-10 12:29:12,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:29:12,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:29:12,217 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:29:12,222 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 12:29:12,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:29:12,232 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 12:29:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 12:29:12,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:12,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:12,237 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1248781538, now seen corresponding path program 1 times [2022-01-10 12:29:12,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:12,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429738462] [2022-01-10 12:29:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:12,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:12,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:12,531 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 12:29:12,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:12,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429738462] [2022-01-10 12:29:12,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429738462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:29:12,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:29:12,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:29:12,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017090944] [2022-01-10 12:29:12,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:29:12,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:29:12,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:29:12,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:29:12,563 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 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 12:29:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:12,657 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-01-10 12:29:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:29:12,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 12:29:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:12,665 INFO L225 Difference]: With dead ends: 36 [2022-01-10 12:29:12,665 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 12:29:12,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:29:12,672 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:12,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 70 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:29:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 12:29:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 12:29:12,709 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 12:29:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-01-10 12:29:12,713 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2022-01-10 12:29:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:12,714 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-01-10 12:29:12,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 12:29:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-01-10 12:29:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 12:29:12,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:12,718 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 12:29:12,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:29:12,719 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:12,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1675309908, now seen corresponding path program 1 times [2022-01-10 12:29:12,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:12,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000847777] [2022-01-10 12:29:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:12,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:12,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:12,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:12,831 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 12:29:12,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:12,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000847777] [2022-01-10 12:29:12,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000847777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565925492] [2022-01-10 12:29:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:12,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:12,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:12,833 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 12:29:12,834 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 12:29:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 12:29:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:12,977 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 12:29:12,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:13,083 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 12:29:13,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565925492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:29:13,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:29:13,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-10 12:29:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015252655] [2022-01-10 12:29:13,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 12:29:13,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 12:29:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 12:29:13,092 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 12:29:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:13,193 INFO L93 Difference]: Finished difference Result 59 states and 109 transitions. [2022-01-10 12:29:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 12:29:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2022-01-10 12:29:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:13,208 INFO L225 Difference]: With dead ends: 59 [2022-01-10 12:29:13,208 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 12:29:13,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-10 12:29:13,210 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:13,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:29:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 12:29:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-10 12:29:13,223 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 12:29:13,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 62 transitions. [2022-01-10 12:29:13,226 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 62 transitions. Word has length 19 [2022-01-10 12:29:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:13,227 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 62 transitions. [2022-01-10 12:29:13,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 12:29:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 62 transitions. [2022-01-10 12:29:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 12:29:13,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:13,236 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 12:29:13,276 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 12:29:13,455 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 12:29:13,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash -293896410, now seen corresponding path program 1 times [2022-01-10 12:29:13,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:13,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065000723] [2022-01-10 12:29:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:13,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 12:29:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 12:29:13,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:13,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065000723] [2022-01-10 12:29:13,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065000723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715070226] [2022-01-10 12:29:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:13,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:13,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:13,818 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 12:29:13,843 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 12:29:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 12:29:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 12:29:14,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 12:29:14,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715070226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:29:14,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:29:14,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 16 [2022-01-10 12:29:14,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693264657] [2022-01-10 12:29:14,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:14,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 12:29:14,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 12:29:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-10 12:29:14,509 INFO L87 Difference]: Start difference. First operand 37 states and 62 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2022-01-10 12:29:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:14,695 INFO L93 Difference]: Finished difference Result 100 states and 241 transitions. [2022-01-10 12:29:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:29:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) Word has length 43 [2022-01-10 12:29:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:14,698 INFO L225 Difference]: With dead ends: 100 [2022-01-10 12:29:14,698 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 12:29:14,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-01-10 12:29:14,700 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:14,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 115 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:29:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 12:29:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-01-10 12:29:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (41), 18 states have call predecessors, (41), 13 states have call successors, (41) [2022-01-10 12:29:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 97 transitions. [2022-01-10 12:29:14,712 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 97 transitions. Word has length 43 [2022-01-10 12:29:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:14,712 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 97 transitions. [2022-01-10 12:29:14,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 8 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2022-01-10 12:29:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 97 transitions. [2022-01-10 12:29:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 12:29:14,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:14,714 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 12:29:14,735 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 12:29:14,935 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 12:29:14,935 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:14,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2419939, now seen corresponding path program 2 times [2022-01-10 12:29:14,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:14,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504957064] [2022-01-10 12:29:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:14,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:14,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:29:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-10 12:29:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:15,160 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 12:29:15,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:15,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504957064] [2022-01-10 12:29:15,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504957064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:15,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885364984] [2022-01-10 12:29:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:29:15,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:15,162 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 12:29:15,196 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 12:29:15,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:29:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:29:15,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 12:29:15,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:15,440 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 12:29:15,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:15,925 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 12:29:15,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885364984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:29:15,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:29:15,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-10 12:29:15,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876823437] [2022-01-10 12:29:15,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:15,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 12:29:15,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 12:29:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-10 12:29:15,927 INFO L87 Difference]: Start difference. First operand 60 states and 97 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 12:29:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:16,846 INFO L93 Difference]: Finished difference Result 331 states and 997 transitions. [2022-01-10 12:29:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-10 12:29:16,846 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 12:29:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:16,853 INFO L225 Difference]: With dead ends: 331 [2022-01-10 12:29:16,853 INFO L226 Difference]: Without dead ends: 276 [2022-01-10 12:29:16,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=723, Invalid=2817, Unknown=0, NotChecked=0, Total=3540 [2022-01-10 12:29:16,857 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:16,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 141 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 12:29:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-10 12:29:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 133. [2022-01-10 12:29:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 81 states have internal predecessors, (85), 22 states have call successors, (22), 4 states have call predecessors, (22), 31 states have return successors, (210), 47 states have call predecessors, (210), 22 states have call successors, (210) [2022-01-10 12:29:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 317 transitions. [2022-01-10 12:29:16,916 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 317 transitions. Word has length 76 [2022-01-10 12:29:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:16,917 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 317 transitions. [2022-01-10 12:29:16,917 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 12:29:16,917 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 317 transitions. [2022-01-10 12:29:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 12:29:16,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:16,922 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:16,941 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 12:29:17,139 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 12:29:17,139 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1305137867, now seen corresponding path program 3 times [2022-01-10 12:29:17,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:17,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369212966] [2022-01-10 12:29:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:17,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:29:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 12:29:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-10 12:29:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 12:29:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 201 proven. 190 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2022-01-10 12:29:17,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:17,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369212966] [2022-01-10 12:29:17,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369212966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:17,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512084340] [2022-01-10 12:29:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:29:17,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:17,737 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 12:29:17,738 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 12:29:17,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-10 12:29:17,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:29:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 12:29:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 271 proven. 23 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2022-01-10 12:29:20,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 270 proven. 30 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2022-01-10 12:29:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512084340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:29:21,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:29:21,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 8] total 28 [2022-01-10 12:29:21,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682219657] [2022-01-10 12:29:21,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 12:29:21,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 12:29:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=671, Unknown=1, NotChecked=0, Total=756 [2022-01-10 12:29:21,578 INFO L87 Difference]: Start difference. First operand 133 states and 317 transitions. Second operand has 28 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 15 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (26), 15 states have call predecessors, (26), 15 states have call successors, (26) [2022-01-10 12:29:41,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:41,023 INFO L93 Difference]: Finished difference Result 796 states and 5068 transitions. [2022-01-10 12:29:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-10 12:29:41,024 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 15 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (26), 15 states have call predecessors, (26), 15 states have call successors, (26) Word has length 131 [2022-01-10 12:29:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:41,060 INFO L225 Difference]: With dead ends: 796 [2022-01-10 12:29:41,060 INFO L226 Difference]: Without dead ends: 668 [2022-01-10 12:29:41,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 288 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=757, Invalid=4790, Unknown=3, NotChecked=0, Total=5550 [2022-01-10 12:29:41,073 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 80 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:41,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 409 Invalid, 2228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1627 Invalid, 0 Unknown, 300 Unchecked, 1.6s Time] [2022-01-10 12:29:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-10 12:29:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 495. [2022-01-10 12:29:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 289 states have (on average 1.0346020761245676) internal successors, (299), 292 states have internal predecessors, (299), 73 states have call successors, (73), 8 states have call predecessors, (73), 132 states have return successors, (2765), 194 states have call predecessors, (2765), 73 states have call successors, (2765) [2022-01-10 12:29:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 3137 transitions. [2022-01-10 12:29:41,297 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 3137 transitions. Word has length 131 [2022-01-10 12:29:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 3137 transitions. [2022-01-10 12:29:41,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 15 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (26), 15 states have call predecessors, (26), 15 states have call successors, (26) [2022-01-10 12:29:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 3137 transitions. [2022-01-10 12:29:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 12:29:41,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:41,307 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:41,325 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 12:29:41,515 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 12:29:41,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1575594763, now seen corresponding path program 4 times [2022-01-10 12:29:41,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:41,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223724967] [2022-01-10 12:29:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:41,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:29:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:41,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:29:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-10 12:29:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 118 proven. 178 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-01-10 12:29:42,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223724967] [2022-01-10 12:29:42,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223724967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351854186] [2022-01-10 12:29:42,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 12:29:42,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:42,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:42,066 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 12:29:42,068 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 12:29:42,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 12:29:42,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:29:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 12:29:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:29:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 298 proven. 15 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-01-10 12:29:42,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:29:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 181 proven. 50 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-01-10 12:29:43,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351854186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:29:43,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:29:43,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 9] total 24 [2022-01-10 12:29:43,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215975101] [2022-01-10 12:29:43,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:29:43,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 12:29:43,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:29:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 12:29:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-01-10 12:29:43,133 INFO L87 Difference]: Start difference. First operand 495 states and 3137 transitions. Second operand has 24 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 11 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-01-10 12:29:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:29:44,903 INFO L93 Difference]: Finished difference Result 681 states and 5926 transitions. [2022-01-10 12:29:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 12:29:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 11 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) Word has length 107 [2022-01-10 12:29:44,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:29:44,909 INFO L225 Difference]: With dead ends: 681 [2022-01-10 12:29:44,909 INFO L226 Difference]: Without dead ends: 191 [2022-01-10 12:29:44,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=504, Invalid=2046, Unknown=0, NotChecked=0, Total=2550 [2022-01-10 12:29:44,925 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 94 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 12:29:44,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 247 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 12:29:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-10 12:29:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 164. [2022-01-10 12:29:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 30 states have call successors, (30), 7 states have call predecessors, (30), 37 states have return successors, (618), 60 states have call predecessors, (618), 30 states have call successors, (618) [2022-01-10 12:29:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 748 transitions. [2022-01-10 12:29:44,955 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 748 transitions. Word has length 107 [2022-01-10 12:29:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:29:44,957 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 748 transitions. [2022-01-10 12:29:44,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 18 states have internal predecessors, (59), 11 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-01-10 12:29:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 748 transitions. [2022-01-10 12:29:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 12:29:44,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:29:44,959 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 12, 8, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:29:44,977 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 12:29:45,168 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 12:29:45,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:29:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:29:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1950957757, now seen corresponding path program 5 times [2022-01-10 12:29:45,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:29:45,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729749431] [2022-01-10 12:29:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:29:45,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:29:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 12:29:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:29:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 12:29:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-10 12:29:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-10 12:29:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:29:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-10 12:29:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:29:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 236 proven. 209 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-01-10 12:29:45,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:29:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729749431] [2022-01-10 12:29:45,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729749431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:29:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193983745] [2022-01-10 12:29:45,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 12:29:45,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:29:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:29:45,879 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 12:29:45,880 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 12:29:46,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-10 12:29:46,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:29:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-10 12:29:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates...