/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_SUM.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:57:13,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:57:13,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:57:13,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 05:57:13,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:57:13,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:57:13,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:57:13,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:57:13,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:57:13,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:57:13,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:57:13,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:57:13,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:57:13,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:57:13,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:57:13,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:57:13,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 05:57:13,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:57:13,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:57:13,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:57:13,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:57:13,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:57:13,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:57:13,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:57:13,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:57:13,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:57:13,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:57:13,246 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:57:13,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:57:13,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:57:13,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:57:13,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:57:13,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:57:13,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:57:13,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:57:13,248 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:57:13,248 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:57:13,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:57:13,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:57:13,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:57:13,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:57:13,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:57:13,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:57:13,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:57:13,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:57:13,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:57:13,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:57:13,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:57:13,250 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:57:13,250 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:57:13,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:57:13,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:57:13,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:57:13,251 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:57:13,251 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:57:13,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:57:13,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:57:13,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:57:13,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:57:13,495 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:57:13,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2022-01-11 05:57:13,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b005e7f9a/e89f1cf5507f4aff801c89fae6c81400/FLAG5509fa8b8 [2022-01-11 05:57:13,875 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:57:13,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2022-01-11 05:57:13,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b005e7f9a/e89f1cf5507f4aff801c89fae6c81400/FLAG5509fa8b8 [2022-01-11 05:57:14,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b005e7f9a/e89f1cf5507f4aff801c89fae6c81400 [2022-01-11 05:57:14,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:57:14,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:57:14,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:57:14,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:57:14,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:57:14,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e98a1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14, skipping insertion in model container [2022-01-11 05:57:14,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:57:14,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:57:14,457 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/Fibonacci01-1.c[804,817] [2022-01-11 05:57:14,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:57:14,481 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:57:14,493 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/Fibonacci01-1.c[804,817] [2022-01-11 05:57:14,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:57:14,502 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:57:14,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14 WrapperNode [2022-01-11 05:57:14,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:57:14,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:57:14,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:57:14,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:57:14,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,513 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,524 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-01-11 05:57:14,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:57:14,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:57:14,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:57:14,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:57:14,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:57:14,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:57:14,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:57:14,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:57:14,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:57:14,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:14,564 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) [2022-01-11 05:57:14,585 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 [2022-01-11 05:57:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-01-11 05:57:14,601 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-01-11 05:57:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:57:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:57:14,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:57:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:57:14,647 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:57:14,648 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:57:14,729 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:57:14,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:57:14,734 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 05:57:14,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:57:14 BoogieIcfgContainer [2022-01-11 05:57:14,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:57:14,736 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:57:14,737 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:57:14,737 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:57:14,740 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:57:14" (1/1) ... [2022-01-11 05:57:14,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:57:14 BasicIcfg [2022-01-11 05:57:14,828 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:57:14,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:57:14,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:57:14,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:57:14,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:57:14" (1/4) ... [2022-01-11 05:57:14,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb08c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:57:14, skipping insertion in model container [2022-01-11 05:57:14,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:57:14" (2/4) ... [2022-01-11 05:57:14,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb08c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:57:14, skipping insertion in model container [2022-01-11 05:57:14,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:57:14" (3/4) ... [2022-01-11 05:57:14,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cb08c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:57:14, skipping insertion in model container [2022-01-11 05:57:14,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:57:14" (4/4) ... [2022-01-11 05:57:14,834 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.cTransformedIcfg [2022-01-11 05:57:14,837 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:57:14,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:57:14,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:57:14,882 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 [2022-01-11 05:57:14,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:57:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-01-11 05:57:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 05:57:14,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:14,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:14,905 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash -627383165, now seen corresponding path program 1 times [2022-01-11 05:57:14,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44171255] [2022-01-11 05:57:14,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:14,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:15,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:57:15,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44171255] [2022-01-11 05:57:15,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44171255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:57:15,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:57:15,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-11 05:57:15,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636416910] [2022-01-11 05:57:15,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:57:15,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 05:57:15,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 05:57:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-11 05:57:15,773 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-01-11 05:57:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:16,057 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-01-11 05:57:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:57:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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 [2022-01-11 05:57:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:16,066 INFO L225 Difference]: With dead ends: 34 [2022-01-11 05:57:16,066 INFO L226 Difference]: Without dead ends: 18 [2022-01-11 05:57:16,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-11 05:57:16,083 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:16,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 61 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-11 05:57:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-11 05:57:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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) [2022-01-11 05:57:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-11 05:57:16,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-01-11 05:57:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:16,125 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-11 05:57:16,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2022-01-11 05:57:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-11 05:57:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 05:57:16,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:16,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:16,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:57:16,127 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1359790534, now seen corresponding path program 1 times [2022-01-11 05:57:16,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:16,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574269126] [2022-01-11 05:57:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:16,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:57:16,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:16,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574269126] [2022-01-11 05:57:16,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574269126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:57:16,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:57:16,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 05:57:16,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543876187] [2022-01-11 05:57:16,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:57:16,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:57:16,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:57:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:57:16,280 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:57:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:16,357 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2022-01-11 05:57:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:57:16,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-11 05:57:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:16,359 INFO L225 Difference]: With dead ends: 24 [2022-01-11 05:57:16,359 INFO L226 Difference]: Without dead ends: 20 [2022-01-11 05:57:16,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-11 05:57:16,361 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:16,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-11 05:57:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-01-11 05:57:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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) [2022-01-11 05:57:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-11 05:57:16,367 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2022-01-11 05:57:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:16,367 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-11 05:57:16,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 05:57:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-11 05:57:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 05:57:16,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:16,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:16,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:57:16,369 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1588078463, now seen corresponding path program 1 times [2022-01-11 05:57:16,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:16,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035946159] [2022-01-11 05:57:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:16,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 05:57:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:16,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:16,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035946159] [2022-01-11 05:57:16,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035946159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889975739] [2022-01-11 05:57:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:16,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:16,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:16,671 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) [2022-01-11 05:57:16,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:57:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:16,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-11 05:57:16,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:16,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:57:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:17,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889975739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:57:17,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:57:17,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-01-11 05:57:17,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338514681] [2022-01-11 05:57:17,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:57:17,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 05:57:17,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:57:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 05:57:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-11 05:57:17,313 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 19 states, 14 states have (on average 2.357142857142857) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 1 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-11 05:57:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:57:17,446 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-01-11 05:57:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 05:57:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.357142857142857) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 1 states have call predecessors, (8), 7 states have call successors, (8) Word has length 23 [2022-01-11 05:57:17,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:57:17,447 INFO L225 Difference]: With dead ends: 34 [2022-01-11 05:57:17,448 INFO L226 Difference]: Without dead ends: 20 [2022-01-11 05:57:17,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-11 05:57:17,449 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:57:17,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 58 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:57:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-11 05:57:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-11 05:57:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-11 05:57:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-11 05:57:17,456 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2022-01-11 05:57:17,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:57:17,456 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-11 05:57:17,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.357142857142857) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (8), 1 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-11 05:57:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-11 05:57:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 05:57:17,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:57:17,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:57:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 05:57:17,671 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 [2022-01-11 05:57:17,672 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:57:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:57:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash 274080802, now seen corresponding path program 1 times [2022-01-11 05:57:17,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:57:17,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884689795] [2022-01-11 05:57:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:17,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:57:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:17,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 05:57:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 05:57:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:18,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:57:18,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884689795] [2022-01-11 05:57:18,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884689795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:57:18,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591497842] [2022-01-11 05:57:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:57:18,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:57:18,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:57:18,089 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) [2022-01-11 05:57:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:57:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:57:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-11 05:57:18,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:57:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:57:18,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:58:09,586 WARN L228 SmtUtils]: Spent 47.51s on a formula simplification. DAG size of input: 8744 DAG size of output: 5766 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)