/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 12:31:27,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 12:31:27,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 12:31:28,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 12:31:28,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 12:31:28,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 12:31:28,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 12:31:28,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 12:31:28,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 12:31:28,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 12:31:28,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 12:31:28,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 12:31:28,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 12:31:28,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 12:31:28,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 12:31:28,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 12:31:28,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 12:31:28,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 12:31:28,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 12:31:28,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 12:31:28,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 12:31:28,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 12:31:28,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 12:31:28,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 12:31:28,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 12:31:28,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 12:31:28,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 12:31:28,133 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 12:31:28,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 12:31:28,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 12:31:28,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 12:31:28,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 12:31:28,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 12:31:28,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 12:31:28,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 12:31:28,135 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 12:31:28,135 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 12:31:28,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 12:31:28,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 12:31:28,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 12:31:28,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 12:31:28,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 12:31:28,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:31:28,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 12:31:28,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 12:31:28,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 12:31:28,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 12:31:28,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 12:31:28,137 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 12:31:28,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 12:31:28,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 12:31:28,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 12:31:28,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 12:31:28,139 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 12:31:28,139 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 12:31:28,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 12:31:28,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 12:31:28,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 12:31:28,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 12:31:28,364 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 12:31:28,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2022-01-10 12:31:28,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a67bef0f/dfebf8fe942a447f8b9f1a6a1fccf8f0/FLAG2b6415a2d [2022-01-10 12:31:28,803 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 12:31:28,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2022-01-10 12:31:28,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a67bef0f/dfebf8fe942a447f8b9f1a6a1fccf8f0/FLAG2b6415a2d [2022-01-10 12:31:29,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a67bef0f/dfebf8fe942a447f8b9f1a6a1fccf8f0 [2022-01-10 12:31:29,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 12:31:29,242 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 12:31:29,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 12:31:29,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 12:31:29,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 12:31:29,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7feac889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29, skipping insertion in model container [2022-01-10 12:31:29,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 12:31:29,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 12:31:29,395 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-1.c[746,759] [2022-01-10 12:31:29,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:31:29,407 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 12:31:29,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-1.c[746,759] [2022-01-10 12:31:29,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 12:31:29,427 INFO L208 MainTranslator]: Completed translation [2022-01-10 12:31:29,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29 WrapperNode [2022-01-10 12:31:29,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 12:31:29,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 12:31:29,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 12:31:29,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 12:31:29,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,455 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 12:31:29,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 12:31:29,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 12:31:29,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 12:31:29,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 12:31:29,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 12:31:29,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 12:31:29,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 12:31:29,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 12:31:29,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 12:31:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:29,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 12:31:29,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 12:31:29,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 12:31:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 12:31:29,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 12:31:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 12:31:29,534 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 12:31:29,534 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 12:31:29,575 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 12:31:29,576 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 12:31:29,653 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 12:31:29,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 12:31:29,658 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 12:31:29,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:31:29 BoogieIcfgContainer [2022-01-10 12:31:29,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 12:31:29,661 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 12:31:29,661 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 12:31:29,662 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 12:31:29,664 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:31:29" (1/1) ... [2022-01-10 12:31:29,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:31:29 BasicIcfg [2022-01-10 12:31:29,726 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 12:31:29,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 12:31:29,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 12:31:29,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 12:31:29,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:31:29" (1/4) ... [2022-01-10 12:31:29,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53910d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:31:29, skipping insertion in model container [2022-01-10 12:31:29,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:31:29" (2/4) ... [2022-01-10 12:31:29,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53910d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:31:29, skipping insertion in model container [2022-01-10 12:31:29,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:31:29" (3/4) ... [2022-01-10 12:31:29,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53910d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:31:29, skipping insertion in model container [2022-01-10 12:31:29,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 12:31:29" (4/4) ... [2022-01-10 12:31:29,750 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_25-1.cTransformedIcfg [2022-01-10 12:31:29,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 12:31:29,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 12:31:29,795 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 12:31:29,801 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 12:31:29,801 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 12:31:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 12:31:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 12:31:29,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:29,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:29,821 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-10 12:31:29,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:29,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488469143] [2022-01-10 12:31:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:29,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:29,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:31:30,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:30,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488469143] [2022-01-10 12:31:30,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488469143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:31:30,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:31:30,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:31:30,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465907156] [2022-01-10 12:31:30,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:31:30,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:31:30,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:31:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:31:30,068 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, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:31:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:30,127 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-01-10 12:31:30,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:31:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 12:31:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:30,135 INFO L225 Difference]: With dead ends: 33 [2022-01-10 12:31:30,136 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 12:31:30,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:31:30,142 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:30,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 74 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:31:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 12:31:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 12:31:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 12:31:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:31:30,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 12:31:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:30,180 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:31:30,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:31:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:31:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 12:31:30,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:30,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:30,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 12:31:30,185 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-10 12:31:30,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:30,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146885206] [2022-01-10 12:31:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:30,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 12:31:30,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:30,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146885206] [2022-01-10 12:31:30,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146885206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:31:30,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 12:31:30,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 12:31:30,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418510874] [2022-01-10 12:31:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:31:30,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 12:31:30,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 12:31:30,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 12:31:30,283 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:31:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:30,348 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 12:31:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 12:31:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 12:31:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:30,350 INFO L225 Difference]: With dead ends: 23 [2022-01-10 12:31:30,350 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 12:31:30,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 12:31:30,355 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:30,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:31:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 12:31:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 12:31:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 12:31:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 12:31:30,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 12:31:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:30,368 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 12:31:30,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 12:31:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 12:31:30,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 12:31:30,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:30,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:30,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 12:31:30,372 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-10 12:31:30,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:30,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340759191] [2022-01-10 12:31:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:30,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:31:30,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340759191] [2022-01-10 12:31:30,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340759191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608062468] [2022-01-10 12:31:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:30,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:30,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:30,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 12:31:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:31:30,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 12:31:30,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 12:31:30,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608062468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 12:31:30,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 12:31:30,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-01-10 12:31:30,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449267391] [2022-01-10 12:31:30,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 12:31:30,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 12:31:30,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 12:31:30,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:31:30,977 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:31:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:30,998 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-01-10 12:31:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:31:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-10 12:31:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:31,000 INFO L225 Difference]: With dead ends: 28 [2022-01-10 12:31:31,000 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 12:31:31,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-01-10 12:31:31,002 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:31,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 12:31:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 12:31:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-01-10 12:31:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 12:31:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-10 12:31:31,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-10 12:31:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-10 12:31:31,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 12:31:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-10 12:31:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 12:31:31,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:31,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:31,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 12:31:31,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:31,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:31,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1731891524, now seen corresponding path program 1 times [2022-01-10 12:31:31,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:31,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078841219] [2022-01-10 12:31:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:31,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:31,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:31,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:31:31,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078841219] [2022-01-10 12:31:31,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078841219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958776708] [2022-01-10 12:31:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:31,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:31,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:31,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:31,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 12:31:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:31:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 12:31:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 12:31:32,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958776708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:32,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:32,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-10 12:31:32,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501078533] [2022-01-10 12:31:32,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:32,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 12:31:32,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:32,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 12:31:32,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 12:31:32,256 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 12:31:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:32,455 INFO L93 Difference]: Finished difference Result 46 states and 77 transitions. [2022-01-10 12:31:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 12:31:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 23 [2022-01-10 12:31:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:32,458 INFO L225 Difference]: With dead ends: 46 [2022-01-10 12:31:32,458 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 12:31:32,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 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 12:31:32,460 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:32,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 12:31:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 12:31:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 12:31:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2022-01-10 12:31:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 44 transitions. [2022-01-10 12:31:32,468 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 44 transitions. Word has length 23 [2022-01-10 12:31:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:32,468 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 44 transitions. [2022-01-10 12:31:32,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 12:31:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 44 transitions. [2022-01-10 12:31:32,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 12:31:32,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:32,470 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:32,488 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 12:31:32,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 12:31:32,680 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1995795547, now seen corresponding path program 2 times [2022-01-10 12:31:32,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:32,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906935179] [2022-01-10 12:31:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:32,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 12:31:32,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:32,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906935179] [2022-01-10 12:31:32,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906935179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:32,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659492550] [2022-01-10 12:31:32,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 12:31:32,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:32,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:32,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:32,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 12:31:33,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 12:31:33,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:33,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 12:31:33,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 12:31:35,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 12:31:36,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659492550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:36,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:36,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 18 [2022-01-10 12:31:36,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138592781] [2022-01-10 12:31:36,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:36,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 12:31:36,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 12:31:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=252, Unknown=1, NotChecked=0, Total=306 [2022-01-10 12:31:36,591 INFO L87 Difference]: Start difference. First operand 28 states and 44 transitions. Second operand has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 12:31:39,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:39,079 INFO L93 Difference]: Finished difference Result 65 states and 134 transitions. [2022-01-10 12:31:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 12:31:39,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 35 [2022-01-10 12:31:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:39,082 INFO L225 Difference]: With dead ends: 65 [2022-01-10 12:31:39,082 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 12:31:39,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=100, Invalid=405, Unknown=1, NotChecked=0, Total=506 [2022-01-10 12:31:39,083 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:39,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 123 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 180 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-01-10 12:31:39,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 12:31:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-01-10 12:31:39,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 6 states have call successors, (6), 1 states have call predecessors, (6), 7 states have return successors, (32), 10 states have call predecessors, (32), 6 states have call successors, (32) [2022-01-10 12:31:39,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 60 transitions. [2022-01-10 12:31:39,094 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 60 transitions. Word has length 35 [2022-01-10 12:31:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:39,094 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 60 transitions. [2022-01-10 12:31:39,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-10 12:31:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 60 transitions. [2022-01-10 12:31:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 12:31:39,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:39,096 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:39,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 12:31:39,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:39,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:39,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:39,319 INFO L85 PathProgramCache]: Analyzing trace with hash -176654579, now seen corresponding path program 3 times [2022-01-10 12:31:39,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:39,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346854967] [2022-01-10 12:31:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:39,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:39,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:39,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:39,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:39,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:39,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 12:31:39,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346854967] [2022-01-10 12:31:39,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346854967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249028779] [2022-01-10 12:31:39,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 12:31:39,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:39,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:39,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:39,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 12:31:39,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 12:31:39,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 12:31:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 12:31:39,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 12:31:40,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249028779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:40,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:40,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2022-01-10 12:31:40,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126877605] [2022-01-10 12:31:40,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:40,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 12:31:40,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:40,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 12:31:40,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-10 12:31:40,186 INFO L87 Difference]: Start difference. First operand 34 states and 60 transitions. Second operand has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-01-10 12:31:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:40,806 INFO L93 Difference]: Finished difference Result 98 states and 204 transitions. [2022-01-10 12:31:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 12:31:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 35 [2022-01-10 12:31:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:40,810 INFO L225 Difference]: With dead ends: 98 [2022-01-10 12:31:40,810 INFO L226 Difference]: Without dead ends: 67 [2022-01-10 12:31:40,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2022-01-10 12:31:40,813 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:40,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 71 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 12:31:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-10 12:31:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2022-01-10 12:31:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (42), 15 states have call predecessors, (42), 9 states have call successors, (42) [2022-01-10 12:31:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 92 transitions. [2022-01-10 12:31:40,833 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 92 transitions. Word has length 35 [2022-01-10 12:31:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:40,833 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 92 transitions. [2022-01-10 12:31:40,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-01-10 12:31:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 92 transitions. [2022-01-10 12:31:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 12:31:40,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:40,844 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:40,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 12:31:41,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:41,059 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 103619678, now seen corresponding path program 4 times [2022-01-10 12:31:41,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:41,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221154652] [2022-01-10 12:31:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:41,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 12:31:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 12:31:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 62 proven. 28 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-01-10 12:31:41,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221154652] [2022-01-10 12:31:41,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221154652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75762060] [2022-01-10 12:31:41,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 12:31:41,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:41,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:41,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:41,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 12:31:41,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 12:31:41,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 12:31:41,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-10 12:31:41,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 90 proven. 75 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 12:31:42,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75762060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:42,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:42,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 13] total 24 [2022-01-10 12:31:42,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375714732] [2022-01-10 12:31:42,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:42,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 12:31:42,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 12:31:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-01-10 12:31:42,989 INFO L87 Difference]: Start difference. First operand 58 states and 92 transitions. Second operand has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-10 12:31:43,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:43,696 INFO L93 Difference]: Finished difference Result 116 states and 185 transitions. [2022-01-10 12:31:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 12:31:43,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) Word has length 71 [2022-01-10 12:31:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:43,701 INFO L225 Difference]: With dead ends: 116 [2022-01-10 12:31:43,701 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 12:31:43,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 12:31:43,703 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:43,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 202 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 12:31:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 12:31:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-01-10 12:31:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 10 states have return successors, (23), 11 states have call predecessors, (23), 6 states have call successors, (23) [2022-01-10 12:31:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2022-01-10 12:31:43,712 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 71 [2022-01-10 12:31:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:43,712 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2022-01-10 12:31:43,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 24 states have internal predecessors, (56), 12 states have call successors, (17), 1 states have call predecessors, (17), 12 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2022-01-10 12:31:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2022-01-10 12:31:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-10 12:31:43,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:43,713 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 16, 9, 9, 9, 9, 9, 9, 7, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:43,739 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 12:31:43,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:43,937 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash 536940144, now seen corresponding path program 5 times [2022-01-10 12:31:43,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:43,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055222228] [2022-01-10 12:31:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:43,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:31:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:31:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 12:31:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 59 proven. 181 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-01-10 12:31:44,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:44,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055222228] [2022-01-10 12:31:44,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055222228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:44,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403053411] [2022-01-10 12:31:44,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 12:31:44,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:44,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:44,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:44,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 12:31:44,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-10 12:31:44,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:44,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 12:31:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 12:31:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 288 proven. 118 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-01-10 12:31:45,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 12:31:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 277 proven. 106 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-10 12:31:50,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403053411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 12:31:50,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 12:31:50,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 14] total 35 [2022-01-10 12:31:50,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385821263] [2022-01-10 12:31:50,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 12:31:50,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-10 12:31:50,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 12:31:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-10 12:31:50,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 12:31:50,530 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-10 12:31:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 12:31:52,699 INFO L93 Difference]: Finished difference Result 121 states and 212 transitions. [2022-01-10 12:31:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 12:31:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) Word has length 125 [2022-01-10 12:31:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 12:31:52,702 INFO L225 Difference]: With dead ends: 121 [2022-01-10 12:31:52,702 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 12:31:52,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=520, Invalid=1832, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 12:31:52,704 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 12:31:52,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 167 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 12:31:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 12:31:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-10 12:31:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 9 states have call successors, (9), 8 states have call predecessors, (9), 10 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2022-01-10 12:31:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2022-01-10 12:31:52,716 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 125 [2022-01-10 12:31:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 12:31:52,717 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2022-01-10 12:31:52,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 32 states have internal predecessors, (69), 16 states have call successors, (23), 1 states have call predecessors, (23), 14 states have return successors, (26), 17 states have call predecessors, (26), 16 states have call successors, (26) [2022-01-10 12:31:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2022-01-10 12:31:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 12:31:52,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 12:31:52,719 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 19, 12, 12, 12, 12, 12, 12, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 12:31:52,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 12:31:52,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:52,929 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 12:31:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 12:31:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash 686923417, now seen corresponding path program 6 times [2022-01-10 12:31:52,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 12:31:52,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384441071] [2022-01-10 12:31:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 12:31:52,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 12:31:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 12:31:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 12:31:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 12:31:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 12:31:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 12:31:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 12:31:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 12:31:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 12:31:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 63 proven. 360 refuted. 0 times theorem prover too weak. 1146 trivial. 0 not checked. [2022-01-10 12:31:53,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 12:31:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384441071] [2022-01-10 12:31:53,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384441071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 12:31:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24979323] [2022-01-10 12:31:53,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 12:31:53,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 12:31:53,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 12:31:53,564 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 12:31:53,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 12:31:53,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-10 12:31:53,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 12:31:53,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 12:31:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates...