/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:21:46,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:21:46,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:21:46,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 18:21:46,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:21:46,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:21:46,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:21:46,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:21:46,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:21:46,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:21:46,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:21:46,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:21:46,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:21:46,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:21:46,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:21:46,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:21:46,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 18:21:46,508 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:21:46,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:21:46,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:21:46,510 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:21:46,529 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:21:46,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:21:46,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:21:46,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:21:46,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:21:46,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:21:46,533 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:21:46,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:21:46,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:21:46,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:21:46,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:21:46,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:21:46,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:21:46,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:21:46,534 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:21:46,535 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:21:46,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:21:46,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:21:46,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:21:46,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:21:46,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:21:46,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:21:46,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:21:46,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:21:46,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:21:46,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:21:46,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:21:46,537 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:21:46,537 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:21:46,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:21:46,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:21:46,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:21:46,538 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:21:46,539 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:21:46,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:21:46,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:21:46,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:21:46,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:21:46,794 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:21:46,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2022-01-10 18:21:46,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2042a368b/262340a59233467880711a8008797840/FLAG91f19bc1c [2022-01-10 18:21:47,150 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:21:47,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2022-01-10 18:21:47,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2042a368b/262340a59233467880711a8008797840/FLAG91f19bc1c [2022-01-10 18:21:47,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2042a368b/262340a59233467880711a8008797840 [2022-01-10 18:21:47,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:21:47,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:21:47,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:21:47,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:21:47,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:21:47,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2ff26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47, skipping insertion in model container [2022-01-10 18:21:47,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:21:47,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:21:47,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c[746,759] [2022-01-10 18:21:47,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:21:47,763 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:21:47,778 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c[746,759] [2022-01-10 18:21:47,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:21:47,789 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:21:47,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47 WrapperNode [2022-01-10 18:21:47,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:21:47,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:21:47,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:21:47,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:21:47,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,819 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 18:21:47,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:21:47,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:21:47,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:21:47,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:21:47,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:21:47,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:21:47,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:21:47,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:21:47,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (1/1) ... [2022-01-10 18:21:47,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:21:47,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:47,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 18:21:47,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 18:21:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:21:47,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:21:47,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:21:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:21:47,906 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 18:21:47,906 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 18:21:47,960 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:21:47,961 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:21:48,036 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:21:48,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:21:48,042 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:21:48,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:21:48 BoogieIcfgContainer [2022-01-10 18:21:48,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:21:48,044 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:21:48,044 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:21:48,045 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:21:48,047 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:21:48" (1/1) ... [2022-01-10 18:21:48,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:21:48 BasicIcfg [2022-01-10 18:21:48,099 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:21:48,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:21:48,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:21:48,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:21:48,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:21:47" (1/4) ... [2022-01-10 18:21:48,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f26ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:21:48, skipping insertion in model container [2022-01-10 18:21:48,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:21:47" (2/4) ... [2022-01-10 18:21:48,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f26ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:21:48, skipping insertion in model container [2022-01-10 18:21:48,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:21:48" (3/4) ... [2022-01-10 18:21:48,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f26ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:21:48, skipping insertion in model container [2022-01-10 18:21:48,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:21:48" (4/4) ... [2022-01-10 18:21:48,106 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_25-2.cTransformedIcfg [2022-01-10 18:21:48,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:21:48,110 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:21:48,147 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:21:48,153 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:21:48,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:21:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 18:21:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:21:48,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:48,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:48,170 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:48,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-10 18:21:48,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:48,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409221323] [2022-01-10 18:21:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:48,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:48,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:21:48,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:48,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409221323] [2022-01-10 18:21:48,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409221323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:21:48,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:21:48,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:21:48,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113097275] [2022-01-10 18:21:48,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:21:48,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:21:48,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:21:48,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:21:48,630 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:21:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:48,754 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-10 18:21:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:21:48,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:21:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:48,775 INFO L225 Difference]: With dead ends: 29 [2022-01-10 18:21:48,775 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 18:21:48,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:21:48,780 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:48,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:21:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 18:21:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 18:21:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:21:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 18:21:48,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 18:21:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:48,827 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 18:21:48,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:21:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 18:21:48,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:21:48,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:48,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:48,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:21:48,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:48,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-10 18:21:48,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:48,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456803265] [2022-01-10 18:21:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:48,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:48,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:21:48,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:48,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456803265] [2022-01-10 18:21:48,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456803265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:21:48,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:21:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:21:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426224323] [2022-01-10 18:21:48,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:21:48,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:21:48,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:21:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:21:48,945 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:21:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:49,003 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 18:21:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:21:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 18:21:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:49,006 INFO L225 Difference]: With dead ends: 23 [2022-01-10 18:21:49,006 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 18:21:49,007 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 18:21:49,010 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:49,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:21:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 18:21:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 18:21:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:21:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 18:21:49,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 18:21:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:49,024 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 18:21:49,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:21:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 18:21:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:21:49,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:49,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:49,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:21:49,025 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-10 18:21:49,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:49,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215794039] [2022-01-10 18:21:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:49,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:49,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:49,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:49,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:21:49,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:49,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215794039] [2022-01-10 18:21:49,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215794039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:49,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606691209] [2022-01-10 18:21:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:49,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:49,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:21:49,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:21:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:49,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:21:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:21:49,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 18:21:50,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606691209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:50,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:50,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-10 18:21:50,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274240792] [2022-01-10 18:21:50,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:50,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 18:21:50,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:50,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 18:21:50,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-10 18:21:50,537 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-10 18:21:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:51,355 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-10 18:21:51,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:21:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 22 [2022-01-10 18:21:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:51,358 INFO L225 Difference]: With dead ends: 46 [2022-01-10 18:21:51,358 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 18:21:51,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-10 18:21:51,359 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:51,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 18:21:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 18:21:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-10 18:21:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 18:21:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 18:21:51,370 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-10 18:21:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:51,370 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 18:21:51,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-10 18:21:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 18:21:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 18:21:51,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:51,372 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:51,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:51,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:51,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-10 18:21:51,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:51,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281544852] [2022-01-10 18:21:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:51,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:21:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:21:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:21:51,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:51,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281544852] [2022-01-10 18:21:51,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281544852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:51,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201012745] [2022-01-10 18:21:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:51,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:51,818 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 18:21:51,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:21:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:21:51,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 18:21:52,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:21:52,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201012745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:52,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:52,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-10 18:21:52,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875952837] [2022-01-10 18:21:52,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:52,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 18:21:52,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:52,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 18:21:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 18:21:52,358 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 18:21:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:52,510 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-10 18:21:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:21:52,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 36 [2022-01-10 18:21:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:52,512 INFO L225 Difference]: With dead ends: 43 [2022-01-10 18:21:52,512 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 18:21:52,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 18:21:52,514 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:52,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:21:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 18:21:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-10 18:21:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-10 18:21:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-10 18:21:52,523 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-10 18:21:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:52,524 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-10 18:21:52,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 18:21:52,524 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-10 18:21:52,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 18:21:52,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:52,526 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:52,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:52,750 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,SelfDestructingSolverStorable3 [2022-01-10 18:21:52,750 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-10 18:21:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:52,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287664375] [2022-01-10 18:21:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:52,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:52,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:21:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:21:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:21:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:21:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:21:53,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287664375] [2022-01-10 18:21:53,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287664375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903044605] [2022-01-10 18:21:53,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:21:53,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:53,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:53,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:21:53,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:21:53,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:21:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:21:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:21:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-10 18:21:53,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:21:53,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903044605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:53,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:53,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-10 18:21:53,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237937650] [2022-01-10 18:21:53,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:53,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 18:21:53,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:53,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 18:21:53,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:21:53,988 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:21:54,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:54,316 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-10 18:21:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:21:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2022-01-10 18:21:54,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:54,318 INFO L225 Difference]: With dead ends: 81 [2022-01-10 18:21:54,318 INFO L226 Difference]: Without dead ends: 55 [2022-01-10 18:21:54,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-10 18:21:54,320 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:54,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:21:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-10 18:21:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-10 18:21:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (43), 15 states have call predecessors, (43), 7 states have call successors, (43) [2022-01-10 18:21:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-10 18:21:54,333 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-10 18:21:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:54,333 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-10 18:21:54,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:21:54,334 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-10 18:21:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 18:21:54,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:54,337 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:54,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:54,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:54,552 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-10 18:21:54,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043406398] [2022-01-10 18:21:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:54,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:21:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:54,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:21:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:21:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:21:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:21:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:21:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:21:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:21:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 49 proven. 106 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-10 18:21:55,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:21:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043406398] [2022-01-10 18:21:55,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043406398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:21:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192200031] [2022-01-10 18:21:55,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:21:55,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:21:55,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:21:55,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:21:55,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:21:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:21:55,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 18:21:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:21:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 89 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-10 18:21:56,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:21:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-01-10 18:21:59,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192200031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:21:59,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:21:59,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-10 18:21:59,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107761293] [2022-01-10 18:21:59,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:21:59,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 18:21:59,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:21:59,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 18:21:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-10 18:21:59,100 INFO L87 Difference]: Start difference. First operand 49 states and 82 transitions. Second operand has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-10 18:21:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:21:59,705 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2022-01-10 18:21:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 18:21:59,706 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) Word has length 82 [2022-01-10 18:21:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:21:59,708 INFO L225 Difference]: With dead ends: 85 [2022-01-10 18:21:59,708 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 18:21:59,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-01-10 18:21:59,711 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 18:21:59,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 18:21:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 18:21:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-01-10 18:21:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 18:21:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-01-10 18:21:59,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 82 [2022-01-10 18:21:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:21:59,719 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-01-10 18:21:59,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 25 states have internal predecessors, (45), 12 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-10 18:21:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-01-10 18:21:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 18:21:59,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:21:59,721 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:21:59,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 18:21:59,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:21:59,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:21:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:21:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1832080039, now seen corresponding path program 3 times [2022-01-10 18:21:59,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:21:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43174153] [2022-01-10 18:21:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:21:59,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:21:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 34 proven. 59 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:22:00,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43174153] [2022-01-10 18:22:00,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43174153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680059952] [2022-01-10 18:22:00,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:22:00,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:00,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:22:00,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:22:00,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 18:22:00,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:22:00,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:22:00,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 24 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-10 18:22:00,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 62 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 18:22:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680059952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:00,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:00,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-10 18:22:00,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611746172] [2022-01-10 18:22:00,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:00,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 18:22:00,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 18:22:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-10 18:22:00,961 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-10 18:22:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:01,256 INFO L93 Difference]: Finished difference Result 80 states and 128 transitions. [2022-01-10 18:22:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:22:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2022-01-10 18:22:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:01,258 INFO L225 Difference]: With dead ends: 80 [2022-01-10 18:22:01,258 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 18:22:01,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-01-10 18:22:01,259 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:01,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 107 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:22:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 18:22:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-01-10 18:22:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 9 states have return successors, (25), 11 states have call predecessors, (25), 6 states have call successors, (25) [2022-01-10 18:22:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-01-10 18:22:01,278 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 61 [2022-01-10 18:22:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:01,279 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-01-10 18:22:01,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-01-10 18:22:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-01-10 18:22:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-10 18:22:01,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:01,283 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 19, 11, 11, 11, 11, 11, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:01,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 18:22:01,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:01,500 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1914785645, now seen corresponding path program 4 times [2022-01-10 18:22:01,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:01,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736268954] [2022-01-10 18:22:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:01,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:01,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-10 18:22:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 95 proven. 298 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2022-01-10 18:22:02,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736268954] [2022-01-10 18:22:02,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736268954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:02,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061438836] [2022-01-10 18:22:02,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 18:22:02,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:02,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:22:02,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:22:02,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 18:22:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:22:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 18:22:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates...