/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/array-tiling/mlceu2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 15:26:57,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 15:26:57,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 15:26:57,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 15:26:57,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 15:26:57,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 15:26:57,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 15:26:57,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 15:26:58,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 15:26:58,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 15:26:58,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 15:26:58,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 15:26:58,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 15:26:58,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 15:26:58,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 15:26:58,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 15:26:58,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 15:26:58,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 15:26:58,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 15:26:58,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 15:26:58,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 15:26:58,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 15:26:58,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 15:26:58,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 15:26:58,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 15:26:58,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 15:26:58,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 15:26:58,051 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 15:26:58,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 15:26:58,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 15:26:58,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 15:26:58,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 15:26:58,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 15:26:58,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 15:26:58,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:26:58,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 15:26:58,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 15:26:58,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 15:26:58,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 15:26:58,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 15:26:58,054 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 15:26:58,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 15:26:58,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 15:26:58,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 15:26:58,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 15:26:58,054 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 15:26:58,055 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 15:26:58,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 15:26:58,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 15:26:58,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 15:26:58,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 15:26:58,225 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 15:26:58,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu2.c [2022-01-10 15:26:58,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023bebb5a/ece03de101a642e8a2e3351ca6ad8159/FLAG282b67252 [2022-01-10 15:26:58,624 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 15:26:58,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu2.c [2022-01-10 15:26:58,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023bebb5a/ece03de101a642e8a2e3351ca6ad8159/FLAG282b67252 [2022-01-10 15:26:59,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023bebb5a/ece03de101a642e8a2e3351ca6ad8159 [2022-01-10 15:26:59,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 15:26:59,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 15:26:59,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 15:26:59,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 15:26:59,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 15:26:59,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a0c7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59, skipping insertion in model container [2022-01-10 15:26:59,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 15:26:59,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 15:26:59,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu2.c[397,410] [2022-01-10 15:26:59,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:26:59,200 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 15:26:59,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu2.c[397,410] [2022-01-10 15:26:59,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:26:59,235 INFO L208 MainTranslator]: Completed translation [2022-01-10 15:26:59,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59 WrapperNode [2022-01-10 15:26:59,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 15:26:59,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 15:26:59,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 15:26:59,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 15:26:59,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,255 INFO L137 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-01-10 15:26:59,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 15:26:59,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 15:26:59,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 15:26:59,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 15:26:59,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 15:26:59,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 15:26:59,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 15:26:59,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 15:26:59,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:26:59,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:26:59,295 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 15:26:59,297 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 15:26:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 15:26:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 15:26:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 15:26:59,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 15:26:59,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 15:26:59,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 15:26:59,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 15:26:59,371 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 15:26:59,372 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 15:26:59,463 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 15:26:59,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 15:26:59,467 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 15:26:59,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:26:59 BoogieIcfgContainer [2022-01-10 15:26:59,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 15:26:59,469 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 15:26:59,469 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 15:26:59,470 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 15:26:59,472 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:26:59" (1/1) ... [2022-01-10 15:26:59,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:26:59 BasicIcfg [2022-01-10 15:26:59,560 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 15:26:59,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 15:26:59,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 15:26:59,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 15:26:59,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:26:59" (1/4) ... [2022-01-10 15:26:59,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f306938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:26:59, skipping insertion in model container [2022-01-10 15:26:59,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:26:59" (2/4) ... [2022-01-10 15:26:59,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f306938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:26:59, skipping insertion in model container [2022-01-10 15:26:59,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:26:59" (3/4) ... [2022-01-10 15:26:59,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f306938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:26:59, skipping insertion in model container [2022-01-10 15:26:59,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:26:59" (4/4) ... [2022-01-10 15:26:59,565 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu2.cTransformedIcfg [2022-01-10 15:26:59,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 15:26:59,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 15:26:59,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 15:26:59,611 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 15:26:59,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 15:26:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:26:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 15:26:59,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:26:59,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:26:59,627 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:26:59,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:26:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash -593273172, now seen corresponding path program 1 times [2022-01-10 15:26:59,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:26:59,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493629654] [2022-01-10 15:26:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:26:59,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:26:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:26:59,751 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 15:26:59,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:26:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493629654] [2022-01-10 15:26:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493629654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:26:59,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:26:59,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:26:59,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653232612] [2022-01-10 15:26:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:26:59,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 15:26:59,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:26:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 15:26:59,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 15:26:59,788 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:26:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:26:59,799 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-01-10 15:26:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 15:26:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 15:26:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:26:59,805 INFO L225 Difference]: With dead ends: 28 [2022-01-10 15:26:59,805 INFO L226 Difference]: Without dead ends: 13 [2022-01-10 15:26:59,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 15:26:59,811 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:26:59,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 15:26:59,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-10 15:26:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-10 15:26:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:26:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-01-10 15:26:59,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-01-10 15:26:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:26:59,836 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-01-10 15:26:59,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:26:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-01-10 15:26:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 15:26:59,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:26:59,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:26:59,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 15:26:59,839 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:26:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:26:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash -592349651, now seen corresponding path program 1 times [2022-01-10 15:26:59,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:26:59,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813795907] [2022-01-10 15:26:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:26:59,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:26:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:26:59,948 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 15:26:59,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:26:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813795907] [2022-01-10 15:26:59,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813795907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:26:59,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:26:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:26:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805392592] [2022-01-10 15:26:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:26:59,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:26:59,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:26:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:26:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:26:59,951 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:27:00,031 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-01-10 15:27:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:27:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 15:27:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:27:00,032 INFO L225 Difference]: With dead ends: 23 [2022-01-10 15:27:00,032 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 15:27:00,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:27:00,037 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:27:00,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 15:27:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 15:27:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-01-10 15:27:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-10 15:27:00,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-01-10 15:27:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:27:00,046 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-10 15:27:00,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-10 15:27:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 15:27:00,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:27:00,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:27:00,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 15:27:00,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:27:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:27:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -315199144, now seen corresponding path program 1 times [2022-01-10 15:27:00,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:27:00,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502647401] [2022-01-10 15:27:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:00,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:27:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:00,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:27:00,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502647401] [2022-01-10 15:27:00,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502647401] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:27:00,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:27:00,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:27:00,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977407646] [2022-01-10 15:27:00,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:27:00,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:27:00,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:27:00,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:27:00,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:27:00,348 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:27:00,374 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-01-10 15:27:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:27:00,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 15:27:00,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:27:00,375 INFO L225 Difference]: With dead ends: 32 [2022-01-10 15:27:00,375 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 15:27:00,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:27:00,381 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:27:00,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 15:27:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 15:27:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-01-10 15:27:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-10 15:27:00,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-01-10 15:27:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:27:00,390 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-10 15:27:00,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-10 15:27:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 15:27:00,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:27:00,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:27:00,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 15:27:00,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:27:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:27:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash 572304537, now seen corresponding path program 1 times [2022-01-10 15:27:00,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:27:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518907533] [2022-01-10 15:27:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:00,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:27:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:00,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:27:00,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518907533] [2022-01-10 15:27:00,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518907533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:27:00,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805096118] [2022-01-10 15:27:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:00,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:27:00,472 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 15:27:00,473 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 15:27:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 15:27:00,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:27:00,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 15:27:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:00,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:27:00,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-10 15:27:00,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-01-10 15:27:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:00,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805096118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:27:00,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:27:00,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 11 [2022-01-10 15:27:00,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187813555] [2022-01-10 15:27:00,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:27:00,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 15:27:00,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:27:00,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 15:27:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 15:27:00,800 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:27:01,071 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-10 15:27:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 15:27:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 15:27:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:27:01,072 INFO L225 Difference]: With dead ends: 29 [2022-01-10 15:27:01,072 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 15:27:01,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-10 15:27:01,073 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:27:01,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 15:27:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 15:27:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-01-10 15:27:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-10 15:27:01,077 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2022-01-10 15:27:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:27:01,077 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-10 15:27:01,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-10 15:27:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 15:27:01,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:27:01,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:27:01,099 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 15:27:01,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:01,291 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:27:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:27:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -804384345, now seen corresponding path program 1 times [2022-01-10 15:27:01,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:27:01,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942953165] [2022-01-10 15:27:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:01,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:27:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 15:27:01,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:27:01,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942953165] [2022-01-10 15:27:01,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942953165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:27:01,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237545161] [2022-01-10 15:27:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:01,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:01,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:27:01,534 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 15:27:01,536 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 15:27:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:01,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 15:27:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:27:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 15:27:01,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:27:12,562 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_ULTIMATE.start_main_~i~0#1Int| 1))) (let ((.cse1 (mod .cse0 4294967296))) (or (not (< (+ c_~SIZE~0Int (* 2 (mod .cse0 2147483648))) (+ (* 2 (mod c_~SIZE~0Int 2147483648)) .cse1))) (not (let ((.cse2 (div .cse1 65536))) (< (+ .cse2 (* 2 (mod 250 2147483648))) (+ 250 (* (mod .cse2 2147483648) 2))))) (not (= (mod (div .cse1 2147483648) 2) 0))))) is different from false [2022-01-10 15:27:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-01-10 15:27:29,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237545161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:27:29,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:27:29,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-01-10 15:27:29,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812990317] [2022-01-10 15:27:29,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:27:29,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 15:27:29,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:27:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 15:27:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=59, Unknown=1, NotChecked=16, Total=110 [2022-01-10 15:27:29,950 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:27:30,357 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-01-10 15:27:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 15:27:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 15:27:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:27:30,360 INFO L225 Difference]: With dead ends: 51 [2022-01-10 15:27:30,360 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 15:27:30,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=82, Invalid=161, Unknown=1, NotChecked=28, Total=272 [2022-01-10 15:27:30,361 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 15:27:30,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 35 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-01-10 15:27:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 15:27:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2022-01-10 15:27:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-10 15:27:30,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2022-01-10 15:27:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:27:30,365 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-10 15:27:30,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-10 15:27:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 15:27:30,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:27:30,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:27:30,381 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 15:27:30,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:30,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:27:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:27:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1693631592, now seen corresponding path program 1 times [2022-01-10 15:27:30,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:27:30,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625553367] [2022-01-10 15:27:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:30,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:27:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:35,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:27:35,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625553367] [2022-01-10 15:27:35,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625553367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:27:35,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393359790] [2022-01-10 15:27:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:35,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:35,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:27:35,304 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 15:27:35,305 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 15:27:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 15:27:35,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:27:37,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-01-10 15:27:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:38,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:27:41,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-10 15:27:41,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2022-01-10 15:27:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:44,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393359790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:27:44,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:27:44,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-10 15:27:44,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249252262] [2022-01-10 15:27:44,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:27:44,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 15:27:44,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:27:44,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 15:27:44,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=460, Unknown=2, NotChecked=0, Total=552 [2022-01-10 15:27:44,887 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:27:49,373 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-01-10 15:27:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 15:27:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 15:27:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:27:49,374 INFO L225 Difference]: With dead ends: 61 [2022-01-10 15:27:49,374 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 15:27:49,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=327, Invalid=1393, Unknown=2, NotChecked=0, Total=1722 [2022-01-10 15:27:49,379 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 15:27:49,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 90 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 15:27:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 15:27:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 27. [2022-01-10 15:27:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-10 15:27:49,390 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-01-10 15:27:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:27:49,390 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-10 15:27:49,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-10 15:27:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 15:27:49,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:27:49,392 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:27:49,409 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 15:27:49,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:49,599 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:27:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:27:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1839162531, now seen corresponding path program 2 times [2022-01-10 15:27:49,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:27:49,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471796061] [2022-01-10 15:27:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:49,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:27:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:27:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:49,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:27:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471796061] [2022-01-10 15:27:49,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471796061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:27:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553981921] [2022-01-10 15:27:49,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 15:27:49,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:49,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:27:49,800 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 15:27:49,803 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 15:27:49,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 15:27:49,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:27:49,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 15:27:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:27:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:50,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:27:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:27:51,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553981921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:27:51,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:27:51,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-10 15:27:51,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577035228] [2022-01-10 15:27:51,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:27:51,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 15:27:51,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:27:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 15:27:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-10 15:27:51,189 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:27:51,403 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-01-10 15:27:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 15:27:51,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 15:27:51,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:27:51,404 INFO L225 Difference]: With dead ends: 45 [2022-01-10 15:27:51,404 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 15:27:51,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-10 15:27:51,405 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 15:27:51,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-01-10 15:27:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 15:27:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-10 15:27:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-10 15:27:51,410 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2022-01-10 15:27:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:27:51,410 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-10 15:27:51,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:27:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-10 15:27:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 15:27:51,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:27:51,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:27:51,425 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 15:27:51,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:27:51,611 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:27:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:27:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1933251057, now seen corresponding path program 3 times [2022-01-10 15:27:51,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:27:51,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522629299] [2022-01-10 15:27:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:27:51,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:27:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:28:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:28:07,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:28:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522629299] [2022-01-10 15:28:07,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522629299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:28:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037169549] [2022-01-10 15:28:07,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 15:28:07,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:28:07,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:28:07,584 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 15:28:07,584 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 15:28:08,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 15:28:08,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:28:08,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 15:28:08,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:28:08,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-01-10 15:28:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:28:08,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:28:13,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-01-10 15:28:13,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 66