/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_15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:30:42,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:30:42,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:30:42,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:30:42,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:30:42,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:30:42,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:30:42,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:30:42,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:30:42,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:30:42,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:30:42,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:30:42,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:30:42,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:30:42,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:30:42,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:30:42,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:30:42,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:30:42,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:30:42,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:30:42,442 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 12:30:42,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:30:42,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:30:42,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:30:42,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:30:42,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:30:42,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:30:42,481 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:30:42,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:30:42,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:30:42,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:30:42,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:30:42,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:30:42,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:30:42,482 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:30:42,482 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:30:42,483 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:30:42,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:30:42,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:30:42,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:30:42,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:30:42,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:30:42,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:42,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:30:42,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:30:42,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:30:42,485 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:30:42,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:30:42,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:30:42,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:30:42,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:30:42,775 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:30:42,775 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:30:42,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_15-1.c [2022-01-10 12:30:42,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc99c914/79e24828afe34f3eab61bfeead49de20/FLAGfc0c19980 [2022-01-10 12:30:43,227 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:30:43,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_15-1.c [2022-01-10 12:30:43,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc99c914/79e24828afe34f3eab61bfeead49de20/FLAGfc0c19980 [2022-01-10 12:30:43,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc99c914/79e24828afe34f3eab61bfeead49de20 [2022-01-10 12:30:43,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:30:43,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:30:43,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:43,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:30:43,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:30:43,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2fa5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43, skipping insertion in model container [2022-01-10 12:30:43,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:30:43,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:30:43,856 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_15-1.c[744,757] [2022-01-10 12:30:43,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:43,874 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:30:43,928 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_15-1.c[744,757] [2022-01-10 12:30:43,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:30:43,942 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:30:43,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43 WrapperNode [2022-01-10 12:30:43,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:30:43,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:43,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:30:43,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:30:43,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,974 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 12:30:43,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:30:43,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:30:43,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:30:43,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:30:43,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:43,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:44,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:30:44,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:30:44,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:30:44,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:30:44,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (1/1) ... [2022-01-10 12:30:44,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:30:44,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:44,036 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 12:30:44,056 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 12:30:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:30:44,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:30:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:30:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:30:44,080 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 12:30:44,080 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 12:30:44,126 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:30:44,128 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:30:44,240 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:30:44,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:30:44,249 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:30:44,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:44 BoogieIcfgContainer [2022-01-10 12:30:44,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:30:44,251 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:30:44,251 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:30:44,252 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:30:44,255 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:44" (1/1) ... [2022-01-10 12:30:44,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:44 BasicIcfg [2022-01-10 12:30:44,348 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:30:44,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:30:44,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:30:44,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:30:44,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:30:43" (1/4) ... [2022-01-10 12:30:44,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c70deb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:44, skipping insertion in model container [2022-01-10 12:30:44,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:30:43" (2/4) ... [2022-01-10 12:30:44,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c70deb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:30:44, skipping insertion in model container [2022-01-10 12:30:44,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:30:44" (3/4) ... [2022-01-10 12:30:44,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c70deb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:30:44, skipping insertion in model container [2022-01-10 12:30:44,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:30:44" (4/4) ... [2022-01-10 12:30:44,371 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_15-1.cTransformedIcfg [2022-01-10 12:30:44,376 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:30:44,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:30:44,438 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:30:44,448 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 12:30:44,448 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:30:44,463 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 12:30:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:30:44,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:44,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:44,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-10 12:30:44,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:44,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848434628] [2022-01-10 12:30:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:44,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:44,785 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 12:30:44,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848434628] [2022-01-10 12:30:44,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848434628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:44,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:44,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:30:44,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176524355] [2022-01-10 12:30:44,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:44,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:30:44,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:30:44,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:30:44,817 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 12:30:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:44,927 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-10 12:30:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:30:44,929 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 12:30:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:44,935 INFO L225 Difference]: With dead ends: 29 [2022-01-10 12:30:44,935 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 12:30:44,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:30:44,941 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:44,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 12:30:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 12:30:44,979 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 12:30:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:30:44,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 12:30:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:44,983 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:30:44,983 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 12:30:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:30:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 12:30:44,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:44,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:30:44,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:30:44,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:44,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:44,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-10 12:30:44,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:44,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676614743] [2022-01-10 12:30:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:44,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:45,053 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 12:30:45,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676614743] [2022-01-10 12:30:45,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676614743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:30:45,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:30:45,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:30:45,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921704543] [2022-01-10 12:30:45,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:30:45,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:30:45,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:30:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:30:45,056 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 12:30:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:45,123 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 12:30:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:30:45,123 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 12:30:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:45,126 INFO L225 Difference]: With dead ends: 23 [2022-01-10 12:30:45,126 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 12:30:45,128 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 12:30:45,129 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:45,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:30:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 12:30:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 12:30:45,135 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 12:30:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:30:45,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 12:30:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:45,136 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:30:45,136 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 12:30:45,136 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:30:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 12:30:45,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:45,137 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 12:30:45,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:30:45,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-10 12:30:45,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:45,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125792844] [2022-01-10 12:30:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:45,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:45,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:45,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:45,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:30:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:45,449 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 12:30:45,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125792844] [2022-01-10 12:30:45,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125792844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038737345] [2022-01-10 12:30:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:45,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:45,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:45,455 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 12:30:45,466 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 12:30:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:45,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:30:45,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:45,955 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 12:30:45,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:46,739 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 12:30:46,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038737345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:46,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:46,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-10 12:30:46,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283551053] [2022-01-10 12:30:46,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:46,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 12:30:46,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 12:30:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:30:46,743 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 12:30:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:47,654 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-10 12:30:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:30:47,656 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 12:30:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:47,658 INFO L225 Difference]: With dead ends: 46 [2022-01-10 12:30:47,658 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 12:30:47,659 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 12:30:47,660 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:47,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 12:30:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 12:30:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-10 12:30:47,668 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 12:30:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 12:30:47,669 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-10 12:30:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:47,670 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 12:30:47,670 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 12:30:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 12:30:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 12:30:47,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:47,673 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 12:30:47,697 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 12:30:47,887 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 12:30:47,888 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-10 12:30:47,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:47,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192639076] [2022-01-10 12:30:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:47,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:30:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,111 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 12:30:48,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:48,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192639076] [2022-01-10 12:30:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192639076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:48,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609086983] [2022-01-10 12:30:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:48,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:48,115 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 12:30:48,117 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 12:30:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:30:48,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:48,398 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 12:30:48,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:48,732 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 12:30:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609086983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:48,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:48,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-10 12:30:48,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509192784] [2022-01-10 12:30:48,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:48,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 12:30:48,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 12:30:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 12:30:48,737 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 12:30:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:48,894 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-10 12:30:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:30:48,896 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 12:30:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:48,897 INFO L225 Difference]: With dead ends: 43 [2022-01-10 12:30:48,897 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 12:30:48,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 12:30:48,899 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 12:30:48,899 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 12:30:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 12:30:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-10 12:30:48,918 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 12:30:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-10 12:30:48,921 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-10 12:30:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:48,927 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-10 12:30:48,927 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 12:30:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-10 12:30:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 12:30:48,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:48,933 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 12:30:48,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 12:30:49,160 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 12:30:49,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-10 12:30:49,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:49,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968183592] [2022-01-10 12:30:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:49,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:30:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:30:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:49,429 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 12:30:49,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968183592] [2022-01-10 12:30:49,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968183592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296343942] [2022-01-10 12:30:49,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:30:49,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:49,431 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 12:30:49,463 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 12:30:49,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:30:49,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:30:49,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:49,667 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 12:30:49,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:50,314 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 12:30:50,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296343942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:50,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:50,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-10 12:30:50,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818834849] [2022-01-10 12:30:50,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:50,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 12:30:50,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 12:30:50,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-10 12:30:50,316 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 12:30:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:50,624 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-10 12:30:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:30:50,624 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 12:30:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:50,626 INFO L225 Difference]: With dead ends: 81 [2022-01-10 12:30:50,626 INFO L226 Difference]: Without dead ends: 55 [2022-01-10 12:30:50,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-10 12:30:50,628 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:50,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 12:30:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-10 12:30:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-10 12:30:50,641 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 12:30:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-10 12:30:50,643 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-10 12:30:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:50,643 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-10 12:30:50,643 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 12:30:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-10 12:30:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 12:30:50,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:50,645 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 12:30:50,671 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 12:30:50,868 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 12:30:50,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-10 12:30:50,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:50,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126686147] [2022-01-10 12:30:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:50,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:30:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 12:30:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 12:30:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:30:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 12:30:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 12:30:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:51,418 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 12:30:51,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126686147] [2022-01-10 12:30:51,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126686147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195754966] [2022-01-10 12:30:51,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:30:51,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:51,420 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 12:30:51,433 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 12:30:51,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:30:51,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:51,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 12:30:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:52,486 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 12:30:52,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:55,389 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 12:30:55,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195754966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:55,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:55,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 26 [2022-01-10 12:30:55,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885997234] [2022-01-10 12:30:55,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:55,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 12:30:55,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 12:30:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-10 12:30:55,392 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 12:30:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:56,087 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2022-01-10 12:30:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:30:56,088 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 12:30:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:56,089 INFO L225 Difference]: With dead ends: 85 [2022-01-10 12:30:56,090 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 12:30:56,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2022-01-10 12:30:56,092 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:56,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 12:30:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 12:30:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-01-10 12:30:56,103 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 12:30:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-01-10 12:30:56,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 82 [2022-01-10 12:30:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:56,104 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-01-10 12:30:56,104 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 12:30:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-01-10 12:30:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 12:30:56,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:56,105 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 12:30:56,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 12:30:56,312 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 12:30:56,312 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1832080039, now seen corresponding path program 3 times [2022-01-10 12:30:56,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:56,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933975458] [2022-01-10 12:30:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:56,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:30:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:30:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:56,543 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 12:30:56,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:56,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933975458] [2022-01-10 12:30:56,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933975458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:56,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828391126] [2022-01-10 12:30:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:30:56,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:56,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:56,545 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 12:30:56,546 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 12:30:56,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 12:30:56,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:56,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:30:56,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:30:56,807 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 12:30:56,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:30:57,274 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 12:30:57,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828391126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:30:57,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:30:57,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-10 12:30:57,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970574489] [2022-01-10 12:30:57,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:30:57,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 12:30:57,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:30:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 12:30:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-10 12:30:57,276 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 12:30:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:30:57,586 INFO L93 Difference]: Finished difference Result 80 states and 128 transitions. [2022-01-10 12:30:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 12:30:57,587 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 12:30:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:30:57,588 INFO L225 Difference]: With dead ends: 80 [2022-01-10 12:30:57,588 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 12:30:57,589 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 12:30:57,590 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, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 12:30:57,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 107 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 12:30:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 12:30:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-01-10 12:30:57,599 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 12:30:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-01-10 12:30:57,600 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 61 [2022-01-10 12:30:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:30:57,601 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-01-10 12:30:57,601 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 12:30:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-01-10 12:30:57,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-10 12:30:57,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:30:57,603 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 12:30:57,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 12:30:57,815 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 12:30:57,816 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:30:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:30:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1914785645, now seen corresponding path program 4 times [2022-01-10 12:30:57,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:30:57,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201228499] [2022-01-10 12:30:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:30:57,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:30:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:57,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:30:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:30:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:30:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:30:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:30:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-10 12:30:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:30:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:30:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:30:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:30:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:30:58,428 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 12:30:58,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:30:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201228499] [2022-01-10 12:30:58,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201228499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:30:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570970022] [2022-01-10 12:30:58,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 12:30:58,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:30:58,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:30:58,430 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 12:30:58,431 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 12:30:58,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 12:30:58,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:30:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:30:58,641 INFO L286 TraceCheckSpWp]: Computing forward predicates...