/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:31:30,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:31:30,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:31:30,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:31:30,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:31:30,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:31:30,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:31:30,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:31:30,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:31:30,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:31:30,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:31:30,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:31:30,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:31:30,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:31:30,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:31:30,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:31:30,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:31:30,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:31:30,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:31:30,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:31:30,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:31:30,491 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:31:30,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:31:30,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:31:30,492 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:31:30,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:31:30,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:31:30,493 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:31:30,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:31:30,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:31:30,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:31:30,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:31:30,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:31:30,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:31:30,494 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:31:30,494 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:31:30,494 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:31:30,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:31:30,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:31:30,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:31:30,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:31:30,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:31:30,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:31:30,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:31:30,497 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:31:30,497 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:31:30,497 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:31:30,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:31:30,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:31:30,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:31:30,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:31:30,682 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:31:30,683 INFO L432 ainManager$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 12:31:30,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60bf1e99e/b5c989ab07a849209fce090d45d928e9/FLAG42272363e [2022-01-10 12:31:31,094 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:31:31,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2022-01-10 12:31:31,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60bf1e99e/b5c989ab07a849209fce090d45d928e9/FLAG42272363e [2022-01-10 12:31:31,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60bf1e99e/b5c989ab07a849209fce090d45d928e9 [2022-01-10 12:31:31,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:31:31,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:31:31,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:31:31,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:31:31,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:31:31,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60778178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31, skipping insertion in model container [2022-01-10 12:31:31,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:31:31,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:31:31,714 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 12:31:31,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:31:31,727 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:31:31,738 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 12:31:31,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:31:31,750 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:31:31,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31 WrapperNode [2022-01-10 12:31:31,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:31:31,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:31:31,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:31:31,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:31:31,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,774 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 12:31:31,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:31:31,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:31:31,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:31:31,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:31:31,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:31:31,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:31:31,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:31:31,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:31:31,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:31,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:31:31,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:31,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 12:31:31,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 12:31:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:31:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:31:31,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:31:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:31:31,859 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 12:31:31,859 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 12:31:31,902 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:31:31,903 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:31:31,969 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:31:31,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:31:31,973 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:31:31,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:31:31 BoogieIcfgContainer [2022-01-10 12:31:31,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:31:31,975 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:31:31,975 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:31:31,976 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:31:31,977 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:31:31" (1/1) ... [2022-01-10 12:31:32,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:31:32 BasicIcfg [2022-01-10 12:31:32,015 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:31:32,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:31:32,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:31:32,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:31:32,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:31:31" (1/4) ... [2022-01-10 12:31:32,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb6e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:31:32, skipping insertion in model container [2022-01-10 12:31:32,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:31" (2/4) ... [2022-01-10 12:31:32,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb6e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:31:32, skipping insertion in model container [2022-01-10 12:31:32,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:31:31" (3/4) ... [2022-01-10 12:31:32,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb6e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:31:32, skipping insertion in model container [2022-01-10 12:31:32,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:31:32" (4/4) ... [2022-01-10 12:31:32,020 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_25-2.cTransformedIcfg [2022-01-10 12:31:32,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:31:32,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:31:32,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:31:32,054 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 12:31:32,054 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:31:32,062 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 12:31:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:31:32,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:32,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:32,066 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:32,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-10 12:31:32,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:32,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022355793] [2022-01-10 12:31:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:32,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:31:32,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:32,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022355793] [2022-01-10 12:31:32,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022355793] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:31:32,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:31:32,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:31:32,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355765620] [2022-01-10 12:31:32,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:31:32,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:31:32,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:31:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:31:32,326 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 12:31:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:32,398 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-10 12:31:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:31:32,400 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 12:31:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:32,405 INFO L225 Difference]: With dead ends: 29 [2022-01-10 12:31:32,405 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 12:31:32,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:31:32,409 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:32,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:31:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 12:31:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 12:31:32,430 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 12:31:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:31:32,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 12:31:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:32,432 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:31:32,432 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 12:31:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:31:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 12:31:32,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:32,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:32,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:31:32,434 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-10 12:31:32,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:32,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69562029] [2022-01-10 12:31:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:32,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:31:32,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:32,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69562029] [2022-01-10 12:31:32,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69562029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:31:32,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:31:32,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:31:32,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617248327] [2022-01-10 12:31:32,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:31:32,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:31:32,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:31:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:31:32,488 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 12:31:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:32,543 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 12:31:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:31:32,544 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 12:31:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:32,545 INFO L225 Difference]: With dead ends: 23 [2022-01-10 12:31:32,545 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 12:31:32,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:31:32,549 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 12:31:32,549 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 12:31:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 12:31:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 12:31:32,552 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 12:31:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:31:32,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 12:31:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:32,553 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:31:32,553 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 12:31:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:31:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 12:31:32,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:32,554 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 12:31:32,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:31:32,555 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:32,555 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-10 12:31:32,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:32,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688468459] [2022-01-10 12:31:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:32,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,797 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 12:31:32,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688468459] [2022-01-10 12:31:32,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688468459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750118525] [2022-01-10 12:31:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:32,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:32,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:32,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:32,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 12:31:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:31:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:33,192 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 12:31:33,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:33,905 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 12:31:33,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750118525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:33,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:33,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-10 12:31:33,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522505501] [2022-01-10 12:31:33,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:33,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 12:31:33,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 12:31:33,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:31:33,908 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 12:31:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:34,591 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-10 12:31:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:31:34,593 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 12:31:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:34,594 INFO L225 Difference]: With dead ends: 46 [2022-01-10 12:31:34,594 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 12:31:34,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-10 12:31:34,596 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:34,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 12:31:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 12:31:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-10 12:31:34,602 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 12:31:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 12:31:34,604 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-10 12:31:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:34,604 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 12:31:34,605 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 12:31:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 12:31:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 12:31:34,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:34,606 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 12:31:34,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 12:31:34,819 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 12:31:34,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-10 12:31:34,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:34,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121552105] [2022-01-10 12:31:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:34,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:34,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:34,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:34,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:34,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:34,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:34,969 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 12:31:34,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121552105] [2022-01-10 12:31:34,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121552105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095074650] [2022-01-10 12:31:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:34,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:34,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:35,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 12:31:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:31:35,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:35,178 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 12:31:35,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:35,432 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 12:31:35,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095074650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:35,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:35,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-10 12:31:35,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996326115] [2022-01-10 12:31:35,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:35,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 12:31:35,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:35,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 12:31:35,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 12:31:35,434 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 12:31:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:35,542 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-10 12:31:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:31:35,542 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 12:31:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:35,543 INFO L225 Difference]: With dead ends: 43 [2022-01-10 12:31:35,544 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 12:31:35,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 12:31:35,544 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 12:31:35,545 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 12:31:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 12:31:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-10 12:31:35,550 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 12:31:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-10 12:31:35,551 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-10 12:31:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:35,552 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-10 12:31:35,552 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 12:31:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-10 12:31:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 12:31:35,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:35,553 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 12:31:35,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 12:31:35,769 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 12:31:35,770 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-10 12:31:35,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:35,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619431644] [2022-01-10 12:31:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:35,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:35,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:36,003 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 12:31:36,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619431644] [2022-01-10 12:31:36,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619431644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799811787] [2022-01-10 12:31:36,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:31:36,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:36,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:36,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 12:31:36,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:31:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:31:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:36,202 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 12:31:36,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:36,686 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 12:31:36,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799811787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:36,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:36,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-10 12:31:36,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281002005] [2022-01-10 12:31:36,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:36,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 12:31:36,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:36,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 12:31:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-10 12:31:36,688 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 12:31:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:36,891 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-10 12:31:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:31:36,892 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 12:31:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:36,893 INFO L225 Difference]: With dead ends: 81 [2022-01-10 12:31:36,894 INFO L226 Difference]: Without dead ends: 55 [2022-01-10 12:31:36,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-10 12:31:36,895 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:36,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:31:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-10 12:31:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-10 12:31:36,907 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 12:31:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-10 12:31:36,908 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-10 12:31:36,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:36,909 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-10 12:31:36,909 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 12:31:36,909 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-10 12:31:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 12:31:36,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:36,911 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 12:31:36,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 12:31:37,111 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 12:31:37,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-10 12:31:37,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:37,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491413762] [2022-01-10 12:31:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:37,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 12:31:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 12:31:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 12:31:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 12:31:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:37,550 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 12:31:37,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:37,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491413762] [2022-01-10 12:31:37,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491413762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:37,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606988080] [2022-01-10 12:31:37,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:31:37,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:37,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:37,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 12:31:37,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:31:37,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:37,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 12:31:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:38,500 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 12:31:38,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:40,841 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 12:31:40,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606988080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:40,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:40,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-10 12:31:40,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661509429] [2022-01-10 12:31:40,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:40,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 12:31:40,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 12:31:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-10 12:31:40,843 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 12:31:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:41,413 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2022-01-10 12:31:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:31:41,415 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 12:31:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:41,418 INFO L225 Difference]: With dead ends: 85 [2022-01-10 12:31:41,418 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 12:31:41,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-01-10 12:31:41,420 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, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:41,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 12:31:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 12:31:41,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-01-10 12:31:41,424 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 12:31:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-01-10 12:31:41,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 82 [2022-01-10 12:31:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:41,425 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-01-10 12:31:41,425 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 12:31:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-01-10 12:31:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 12:31:41,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:41,427 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 12:31:41,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 12:31:41,631 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 12:31:41,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1832080039, now seen corresponding path program 3 times [2022-01-10 12:31:41,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:41,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636176856] [2022-01-10 12:31:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:41,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:31:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,790 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 12:31:41,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636176856] [2022-01-10 12:31:41,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636176856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:41,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105977134] [2022-01-10 12:31:41,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:31:41,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:41,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:41,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:41,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 12:31:41,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 12:31:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:31:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:41,976 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 12:31:41,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:42,379 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 12:31:42,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105977134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:42,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:42,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-10 12:31:42,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308024998] [2022-01-10 12:31:42,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:42,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 12:31:42,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:42,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 12:31:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-10 12:31:42,381 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 12:31:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:42,638 INFO L93 Difference]: Finished difference Result 80 states and 128 transitions. [2022-01-10 12:31:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 12:31:42,639 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 12:31:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:42,640 INFO L225 Difference]: With dead ends: 80 [2022-01-10 12:31:42,640 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 12:31:42,641 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 12:31:42,641 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 12:31:42,641 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 12:31:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 12:31:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-01-10 12:31:42,647 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 12:31:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-01-10 12:31:42,648 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 61 [2022-01-10 12:31:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:42,648 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-01-10 12:31:42,648 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 12:31:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-01-10 12:31:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-10 12:31:42,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:42,651 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 12:31:42,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-10 12:31:42,866 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 12:31:42,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1914785645, now seen corresponding path program 4 times [2022-01-10 12:31:42,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404977813] [2022-01-10 12:31:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:42,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:31:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:31:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-10 12:31:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:31:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:43,351 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 12:31:43,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:43,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404977813] [2022-01-10 12:31:43,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404977813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:43,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039807890] [2022-01-10 12:31:43,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 12:31:43,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:43,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:43,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:43,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 12:31:43,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 12:31:43,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:43,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:31:43,560 INFO L286 TraceCheckSpWp]: Computing forward predicates...