/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_NONE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:49:13,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:49:13,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:49:13,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:49:13,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:49:13,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:49:13,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:49:13,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:49:13,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:49:13,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:49:13,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:49:13,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:49:13,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:49:13,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:49:13,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:49:13,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:49:13,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:49:13,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:49:13,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:49:13,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:49:13,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:49:13,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:49:13,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:49:13,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:49:13,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:49:13,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:49:13,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:49:13,382 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:49:13,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:49:13,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:49:13,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:49:13,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:49:13,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:49:13,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:49:13,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:49:13,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:49:13,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:49:13,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:49:13,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:49:13,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:49:13,385 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:49:13,385 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:49:13,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:49:13,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:49:13,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:49:13,386 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:49:13,386 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:49:13,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:49:13,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:49:13,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:49:13,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:49:13,669 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:49:13,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label09.c [2022-01-10 21:49:13,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1fe2899/61d6c0803dec4b14b44b61502d991bc4/FLAG7fc1efccd [2022-01-10 21:49:14,213 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:49:14,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label09.c [2022-01-10 21:49:14,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1fe2899/61d6c0803dec4b14b44b61502d991bc4/FLAG7fc1efccd [2022-01-10 21:49:14,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c1fe2899/61d6c0803dec4b14b44b61502d991bc4 [2022-01-10 21:49:14,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:49:14,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:49:14,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:49:14,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:49:14,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:49:14,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:49:14" (1/1) ... [2022-01-10 21:49:14,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5379875c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:14, skipping insertion in model container [2022-01-10 21:49:14,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:49:14" (1/1) ... [2022-01-10 21:49:14,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:49:14,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:49:14,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label09.c[54191,54204] [2022-01-10 21:49:15,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:49:15,030 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:49:15,213 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label09.c[54191,54204] [2022-01-10 21:49:15,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:49:15,255 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:49:15,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15 WrapperNode [2022-01-10 21:49:15,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:49:15,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:49:15,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:49:15,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:49:15,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,378 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:49:15,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:49:15,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:49:15,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:49:15,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:49:15,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:49:15,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:49:15,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:49:15,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:49:15,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (1/1) ... [2022-01-10 21:49:15,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:49:15,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:15,555 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 21:49:15,580 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 21:49:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:49:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:49:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:49:15,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:49:15,734 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:49:15,735 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:49:17,468 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:49:17,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:49:17,486 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:49:17,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:17 BoogieIcfgContainer [2022-01-10 21:49:17,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:49:17,489 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:49:17,489 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:49:17,491 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:49:17,493 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:17" (1/1) ... [2022-01-10 21:49:17,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:49:17 BasicIcfg [2022-01-10 21:49:17,910 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:49:17,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:49:17,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:49:17,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:49:17,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:49:14" (1/4) ... [2022-01-10 21:49:17,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff0d86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:49:17, skipping insertion in model container [2022-01-10 21:49:17,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:49:15" (2/4) ... [2022-01-10 21:49:17,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff0d86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:49:17, skipping insertion in model container [2022-01-10 21:49:17,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:49:17" (3/4) ... [2022-01-10 21:49:17,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff0d86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:49:17, skipping insertion in model container [2022-01-10 21:49:17,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:49:17" (4/4) ... [2022-01-10 21:49:17,917 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label09.cTransformedIcfg [2022-01-10 21:49:17,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:49:17,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:49:17,973 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:49:17,978 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 21:49:17,978 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:49:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 21:49:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 21:49:18,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:18,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:18,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:18,021 INFO L85 PathProgramCache]: Analyzing trace with hash 863408942, now seen corresponding path program 1 times [2022-01-10 21:49:18,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:18,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328794948] [2022-01-10 21:49:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:18,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:18,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:18,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328794948] [2022-01-10 21:49:18,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328794948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:18,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:18,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:18,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889457101] [2022-01-10 21:49:18,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:18,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:18,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:18,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:18,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:18,766 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 21:49:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:20,007 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-01-10 21:49:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2022-01-10 21:49:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:20,021 INFO L225 Difference]: With dead ends: 864 [2022-01-10 21:49:20,021 INFO L226 Difference]: Without dead ends: 468 [2022-01-10 21:49:20,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:49:20,028 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 130 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:20,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 165 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:49:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-10 21:49:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-01-10 21:49:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 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 21:49:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-01-10 21:49:20,094 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 148 [2022-01-10 21:49:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:20,095 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-01-10 21:49:20,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 21:49:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-01-10 21:49:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-10 21:49:20,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:20,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:20,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:49:20,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1670321496, now seen corresponding path program 1 times [2022-01-10 21:49:20,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599259936] [2022-01-10 21:49:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:20,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:20,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599259936] [2022-01-10 21:49:20,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599259936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:20,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:20,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:20,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903772543] [2022-01-10 21:49:20,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:20,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:20,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:20,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:20,254 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 21:49:20,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:20,661 INFO L93 Difference]: Finished difference Result 1345 states and 2190 transitions. [2022-01-10 21:49:20,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2022-01-10 21:49:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:20,666 INFO L225 Difference]: With dead ends: 1345 [2022-01-10 21:49:20,667 INFO L226 Difference]: Without dead ends: 893 [2022-01-10 21:49:20,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:49:20,670 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:20,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 21:49:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-10 21:49:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 891. [2022-01-10 21:49:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.6258426966292134) internal successors, (1447), 890 states have internal predecessors, (1447), 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 21:49:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1447 transitions. [2022-01-10 21:49:20,702 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1447 transitions. Word has length 153 [2022-01-10 21:49:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:20,702 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1447 transitions. [2022-01-10 21:49:20,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 21:49:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1447 transitions. [2022-01-10 21:49:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-10 21:49:20,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:20,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:20,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:49:20,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1814962357, now seen corresponding path program 1 times [2022-01-10 21:49:20,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920976412] [2022-01-10 21:49:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:20,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:20,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:20,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920976412] [2022-01-10 21:49:20,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920976412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:20,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:20,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:20,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086765000] [2022-01-10 21:49:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:20,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:20,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:20,818 INFO L87 Difference]: Start difference. First operand 891 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 21:49:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:21,883 INFO L93 Difference]: Finished difference Result 2620 states and 4271 transitions. [2022-01-10 21:49:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:21,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 154 [2022-01-10 21:49:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:21,890 INFO L225 Difference]: With dead ends: 2620 [2022-01-10 21:49:21,890 INFO L226 Difference]: Without dead ends: 1731 [2022-01-10 21:49:21,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:49:21,893 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 252 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:21,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 162 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-10 21:49:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1726. [2022-01-10 21:49:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.5217391304347827) internal successors, (2625), 1725 states have internal predecessors, (2625), 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 21:49:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2625 transitions. [2022-01-10 21:49:21,924 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2625 transitions. Word has length 154 [2022-01-10 21:49:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:21,924 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2625 transitions. [2022-01-10 21:49:21,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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 21:49:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2625 transitions. [2022-01-10 21:49:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 21:49:21,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:21,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:49:21,930 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:21,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1704910830, now seen corresponding path program 1 times [2022-01-10 21:49:21,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475214122] [2022-01-10 21:49:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:21,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:22,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:22,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475214122] [2022-01-10 21:49:22,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475214122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:22,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:22,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:22,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555035685] [2022-01-10 21:49:22,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:22,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:22,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:22,032 INFO L87 Difference]: Start difference. First operand 1726 states and 2625 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 21:49:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:23,129 INFO L93 Difference]: Finished difference Result 5105 states and 7793 transitions. [2022-01-10 21:49:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 156 [2022-01-10 21:49:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:23,142 INFO L225 Difference]: With dead ends: 5105 [2022-01-10 21:49:23,142 INFO L226 Difference]: Without dead ends: 3381 [2022-01-10 21:49:23,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:49:23,145 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:23,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 94 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:49:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2022-01-10 21:49:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 3352. [2022-01-10 21:49:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 1.495971351835273) internal successors, (5013), 3351 states have internal predecessors, (5013), 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 21:49:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5013 transitions. [2022-01-10 21:49:23,237 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5013 transitions. Word has length 156 [2022-01-10 21:49:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:23,237 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 5013 transitions. [2022-01-10 21:49:23,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 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 21:49:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5013 transitions. [2022-01-10 21:49:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 21:49:23,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:23,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:23,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:49:23,242 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1916011892, now seen corresponding path program 1 times [2022-01-10 21:49:23,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050909733] [2022-01-10 21:49:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:23,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 21:49:23,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:23,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050909733] [2022-01-10 21:49:23,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050909733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:23,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:23,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:23,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878357349] [2022-01-10 21:49:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:23,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:23,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:23,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:23,365 INFO L87 Difference]: Start difference. First operand 3352 states and 5013 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 21:49:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:24,369 INFO L93 Difference]: Finished difference Result 8343 states and 12434 transitions. [2022-01-10 21:49:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 165 [2022-01-10 21:49:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:24,384 INFO L225 Difference]: With dead ends: 8343 [2022-01-10 21:49:24,384 INFO L226 Difference]: Without dead ends: 4993 [2022-01-10 21:49:24,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:49:24,389 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:24,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 117 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-01-10 21:49:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4991. [2022-01-10 21:49:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4991 states, 4990 states have (on average 1.4627254509018035) internal successors, (7299), 4990 states have internal predecessors, (7299), 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 21:49:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4991 states to 4991 states and 7299 transitions. [2022-01-10 21:49:24,467 INFO L78 Accepts]: Start accepts. Automaton has 4991 states and 7299 transitions. Word has length 165 [2022-01-10 21:49:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:24,467 INFO L470 AbstractCegarLoop]: Abstraction has 4991 states and 7299 transitions. [2022-01-10 21:49:24,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 21:49:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4991 states and 7299 transitions. [2022-01-10 21:49:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 21:49:24,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:24,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:24,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:49:24,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1978894392, now seen corresponding path program 1 times [2022-01-10 21:49:24,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:24,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823148613] [2022-01-10 21:49:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:24,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:24,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823148613] [2022-01-10 21:49:24,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823148613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:24,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:24,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:24,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113138716] [2022-01-10 21:49:24,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:24,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:24,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:24,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:24,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:24,630 INFO L87 Difference]: Start difference. First operand 4991 states and 7299 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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 21:49:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:25,690 INFO L93 Difference]: Finished difference Result 14856 states and 21741 transitions. [2022-01-10 21:49:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:25,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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 167 [2022-01-10 21:49:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:25,730 INFO L225 Difference]: With dead ends: 14856 [2022-01-10 21:49:25,730 INFO L226 Difference]: Without dead ends: 9867 [2022-01-10 21:49:25,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:49:25,741 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 228 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:25,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 165 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2022-01-10 21:49:25,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 9864. [2022-01-10 21:49:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9864 states, 9863 states have (on average 1.3184629423096421) internal successors, (13004), 9863 states have internal predecessors, (13004), 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 21:49:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9864 states to 9864 states and 13004 transitions. [2022-01-10 21:49:25,896 INFO L78 Accepts]: Start accepts. Automaton has 9864 states and 13004 transitions. Word has length 167 [2022-01-10 21:49:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:25,897 INFO L470 AbstractCegarLoop]: Abstraction has 9864 states and 13004 transitions. [2022-01-10 21:49:25,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 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 21:49:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 9864 states and 13004 transitions. [2022-01-10 21:49:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 21:49:25,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:25,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:25,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:49:25,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:25,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:25,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1758978250, now seen corresponding path program 1 times [2022-01-10 21:49:25,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:25,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894912141] [2022-01-10 21:49:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:25,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:49:26,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:26,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894912141] [2022-01-10 21:49:26,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894912141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:26,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:26,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:26,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486039657] [2022-01-10 21:49:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:26,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:26,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:26,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:26,049 INFO L87 Difference]: Start difference. First operand 9864 states and 13004 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 21:49:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:27,236 INFO L93 Difference]: Finished difference Result 28667 states and 37818 transitions. [2022-01-10 21:49:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 170 [2022-01-10 21:49:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:27,279 INFO L225 Difference]: With dead ends: 28667 [2022-01-10 21:49:27,279 INFO L226 Difference]: Without dead ends: 18805 [2022-01-10 21:49:27,294 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 21:49:27,295 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 257 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:27,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 397 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:49:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18805 states. [2022-01-10 21:49:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18805 to 18803. [2022-01-10 21:49:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18803 states, 18802 states have (on average 1.2522603978300182) internal successors, (23545), 18802 states have internal predecessors, (23545), 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 21:49:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18803 states to 18803 states and 23545 transitions. [2022-01-10 21:49:27,647 INFO L78 Accepts]: Start accepts. Automaton has 18803 states and 23545 transitions. Word has length 170 [2022-01-10 21:49:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:27,648 INFO L470 AbstractCegarLoop]: Abstraction has 18803 states and 23545 transitions. [2022-01-10 21:49:27,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 21:49:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 18803 states and 23545 transitions. [2022-01-10 21:49:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-10 21:49:27,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:27,689 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:27,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:49:27,690 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:27,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1841601548, now seen corresponding path program 2 times [2022-01-10 21:49:27,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:27,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334056098] [2022-01-10 21:49:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:27,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:27,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:49:27,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:27,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334056098] [2022-01-10 21:49:27,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334056098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:27,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:27,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:27,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679444343] [2022-01-10 21:49:27,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:27,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:27,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:27,820 INFO L87 Difference]: Start difference. First operand 18803 states and 23545 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 21:49:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:28,919 INFO L93 Difference]: Finished difference Result 45525 states and 56085 transitions. [2022-01-10 21:49:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:28,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 172 [2022-01-10 21:49:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:28,973 INFO L225 Difference]: With dead ends: 45525 [2022-01-10 21:49:28,974 INFO L226 Difference]: Without dead ends: 26724 [2022-01-10 21:49:28,997 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 21:49:28,998 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 232 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:28,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 414 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26724 states. [2022-01-10 21:49:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26724 to 23878. [2022-01-10 21:49:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23878 states, 23877 states have (on average 1.2228504418478032) internal successors, (29198), 23877 states have internal predecessors, (29198), 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 21:49:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23878 states to 23878 states and 29198 transitions. [2022-01-10 21:49:29,392 INFO L78 Accepts]: Start accepts. Automaton has 23878 states and 29198 transitions. Word has length 172 [2022-01-10 21:49:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:29,394 INFO L470 AbstractCegarLoop]: Abstraction has 23878 states and 29198 transitions. [2022-01-10 21:49:29,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 21:49:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 23878 states and 29198 transitions. [2022-01-10 21:49:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-10 21:49:29,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:29,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:29,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:49:29,413 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1623185772, now seen corresponding path program 1 times [2022-01-10 21:49:29,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:29,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450227910] [2022-01-10 21:49:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:29,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:29,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:29,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450227910] [2022-01-10 21:49:29,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450227910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:29,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:29,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:29,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043498438] [2022-01-10 21:49:29,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:29,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:29,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:29,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:29,637 INFO L87 Difference]: Start difference. First operand 23878 states and 29198 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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 21:49:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:31,077 INFO L93 Difference]: Finished difference Result 72245 states and 88629 transitions. [2022-01-10 21:49:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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 186 [2022-01-10 21:49:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:31,264 INFO L225 Difference]: With dead ends: 72245 [2022-01-10 21:49:31,265 INFO L226 Difference]: Without dead ends: 48369 [2022-01-10 21:49:31,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:31,296 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 533 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:31,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 526 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:49:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2022-01-10 21:49:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 48329. [2022-01-10 21:49:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48329 states, 48328 states have (on average 1.219562158583016) internal successors, (58939), 48328 states have internal predecessors, (58939), 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 21:49:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48329 states to 48329 states and 58939 transitions. [2022-01-10 21:49:31,939 INFO L78 Accepts]: Start accepts. Automaton has 48329 states and 58939 transitions. Word has length 186 [2022-01-10 21:49:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:31,940 INFO L470 AbstractCegarLoop]: Abstraction has 48329 states and 58939 transitions. [2022-01-10 21:49:31,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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 21:49:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 48329 states and 58939 transitions. [2022-01-10 21:49:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-10 21:49:31,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:31,964 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:31,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:49:31,964 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1670699081, now seen corresponding path program 1 times [2022-01-10 21:49:31,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:31,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222204412] [2022-01-10 21:49:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:31,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 21:49:32,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222204412] [2022-01-10 21:49:32,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222204412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:32,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:32,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:49:32,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944448105] [2022-01-10 21:49:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:32,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:32,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:32,102 INFO L87 Difference]: Start difference. First operand 48329 states and 58939 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 21:49:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:33,312 INFO L93 Difference]: Finished difference Result 96051 states and 117100 transitions. [2022-01-10 21:49:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 197 [2022-01-10 21:49:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:33,384 INFO L225 Difference]: With dead ends: 96051 [2022-01-10 21:49:33,385 INFO L226 Difference]: Without dead ends: 47724 [2022-01-10 21:49:33,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:49:33,424 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 232 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:33,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 150 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47724 states. [2022-01-10 21:49:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47724 to 47314. [2022-01-10 21:49:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47314 states, 47313 states have (on average 1.1795278253334178) internal successors, (55807), 47313 states have internal predecessors, (55807), 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 21:49:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47314 states to 47314 states and 55807 transitions. [2022-01-10 21:49:34,106 INFO L78 Accepts]: Start accepts. Automaton has 47314 states and 55807 transitions. Word has length 197 [2022-01-10 21:49:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:34,106 INFO L470 AbstractCegarLoop]: Abstraction has 47314 states and 55807 transitions. [2022-01-10 21:49:34,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 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 21:49:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 47314 states and 55807 transitions. [2022-01-10 21:49:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-10 21:49:34,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:34,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:34,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:49:34,138 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:34,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:34,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1109571635, now seen corresponding path program 1 times [2022-01-10 21:49:34,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:34,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695405419] [2022-01-10 21:49:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:34,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 100 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-10 21:49:34,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695405419] [2022-01-10 21:49:34,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695405419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879687484] [2022-01-10 21:49:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:34,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:34,450 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 21:49:34,451 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 21:49:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 7250 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:49:35,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 21:49:35,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:35,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879687484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:35,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:35,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:49:35,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593096109] [2022-01-10 21:49:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:35,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:35,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:49:35,643 INFO L87 Difference]: Start difference. First operand 47314 states and 55807 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 21:49:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:36,698 INFO L93 Difference]: Finished difference Result 94632 states and 111622 transitions. [2022-01-10 21:49:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:36,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 239 [2022-01-10 21:49:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:36,762 INFO L225 Difference]: With dead ends: 94632 [2022-01-10 21:49:36,762 INFO L226 Difference]: Without dead ends: 47320 [2022-01-10 21:49:36,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 238 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 21:49:36,930 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 258 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:36,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 97 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:49:36,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47320 states. [2022-01-10 21:49:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47320 to 46705. [2022-01-10 21:49:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46705 states, 46704 states have (on average 1.1690861596437137) internal successors, (54601), 46704 states have internal predecessors, (54601), 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 21:49:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46705 states to 46705 states and 54601 transitions. [2022-01-10 21:49:37,415 INFO L78 Accepts]: Start accepts. Automaton has 46705 states and 54601 transitions. Word has length 239 [2022-01-10 21:49:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:37,416 INFO L470 AbstractCegarLoop]: Abstraction has 46705 states and 54601 transitions. [2022-01-10 21:49:37,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 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 21:49:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46705 states and 54601 transitions. [2022-01-10 21:49:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-10 21:49:37,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:37,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:37,456 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 21:49:37,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 21:49:37,636 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:37,636 INFO L85 PathProgramCache]: Analyzing trace with hash -274529004, now seen corresponding path program 1 times [2022-01-10 21:49:37,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:37,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207200028] [2022-01-10 21:49:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:37,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:49:38,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:38,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207200028] [2022-01-10 21:49:38,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207200028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:38,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:38,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:38,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376081356] [2022-01-10 21:49:38,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:38,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:38,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:38,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:38,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:49:38,022 INFO L87 Difference]: Start difference. First operand 46705 states and 54601 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 21:49:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:39,273 INFO L93 Difference]: Finished difference Result 112742 states and 131714 transitions. [2022-01-10 21:49:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:39,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 248 [2022-01-10 21:49:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:39,350 INFO L225 Difference]: With dead ends: 112742 [2022-01-10 21:49:39,350 INFO L226 Difference]: Without dead ends: 66039 [2022-01-10 21:49:39,385 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 21:49:39,385 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 137 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:39,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 425 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:49:39,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66039 states. [2022-01-10 21:49:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66039 to 66025. [2022-01-10 21:49:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66025 states, 66024 states have (on average 1.1472797770507694) internal successors, (75748), 66024 states have internal predecessors, (75748), 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 21:49:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66025 states to 66025 states and 75748 transitions. [2022-01-10 21:49:40,331 INFO L78 Accepts]: Start accepts. Automaton has 66025 states and 75748 transitions. Word has length 248 [2022-01-10 21:49:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:40,331 INFO L470 AbstractCegarLoop]: Abstraction has 66025 states and 75748 transitions. [2022-01-10 21:49:40,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 21:49:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 66025 states and 75748 transitions. [2022-01-10 21:49:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-10 21:49:40,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:40,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:40,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 21:49:40,369 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash 345177810, now seen corresponding path program 1 times [2022-01-10 21:49:40,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:40,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603926657] [2022-01-10 21:49:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:40,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:49:40,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:40,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603926657] [2022-01-10 21:49:40,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603926657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:40,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:49:40,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:49:40,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834432873] [2022-01-10 21:49:40,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:40,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:40,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:40,811 INFO L87 Difference]: Start difference. First operand 66025 states and 75748 transitions. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 21:49:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:42,766 INFO L93 Difference]: Finished difference Result 138613 states and 159389 transitions. [2022-01-10 21:49:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 264 [2022-01-10 21:49:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:42,861 INFO L225 Difference]: With dead ends: 138613 [2022-01-10 21:49:42,861 INFO L226 Difference]: Without dead ends: 72590 [2022-01-10 21:49:42,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:49:42,886 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 338 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:42,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 139 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 21:49:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72590 states. [2022-01-10 21:49:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72590 to 66025. [2022-01-10 21:49:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66025 states, 66024 states have (on average 1.1472797770507694) internal successors, (75748), 66024 states have internal predecessors, (75748), 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 21:49:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66025 states to 66025 states and 75748 transitions. [2022-01-10 21:49:43,667 INFO L78 Accepts]: Start accepts. Automaton has 66025 states and 75748 transitions. Word has length 264 [2022-01-10 21:49:43,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:43,667 INFO L470 AbstractCegarLoop]: Abstraction has 66025 states and 75748 transitions. [2022-01-10 21:49:43,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 3 states have internal predecessors, (264), 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 21:49:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 66025 states and 75748 transitions. [2022-01-10 21:49:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 21:49:43,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:43,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:43,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:49:43,862 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash 488643728, now seen corresponding path program 1 times [2022-01-10 21:49:43,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:43,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351429982] [2022-01-10 21:49:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:43,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-01-10 21:49:44,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351429982] [2022-01-10 21:49:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351429982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229914906] [2022-01-10 21:49:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:44,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:44,097 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 21:49:44,099 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 21:49:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 8199 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:49:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 21:49:45,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:45,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229914906] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:45,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:45,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:49:45,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334772697] [2022-01-10 21:49:45,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:45,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:45,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:49:45,353 INFO L87 Difference]: Start difference. First operand 66025 states and 75748 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 21:49:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:46,588 INFO L93 Difference]: Finished difference Result 164236 states and 189575 transitions. [2022-01-10 21:49:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:49:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 269 [2022-01-10 21:49:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:46,718 INFO L225 Difference]: With dead ends: 164236 [2022-01-10 21:49:46,719 INFO L226 Difference]: Without dead ends: 98213 [2022-01-10 21:49:46,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 268 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 21:49:46,764 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:46,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 158 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:49:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98213 states. [2022-01-10 21:49:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98213 to 97777. [2022-01-10 21:49:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97777 states, 97776 states have (on average 1.1434401080019636) internal successors, (111801), 97776 states have internal predecessors, (111801), 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 21:49:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97777 states to 97777 states and 111801 transitions. [2022-01-10 21:49:48,086 INFO L78 Accepts]: Start accepts. Automaton has 97777 states and 111801 transitions. Word has length 269 [2022-01-10 21:49:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:48,087 INFO L470 AbstractCegarLoop]: Abstraction has 97777 states and 111801 transitions. [2022-01-10 21:49:48,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 21:49:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 97777 states and 111801 transitions. [2022-01-10 21:49:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-10 21:49:48,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:48,365 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:48,395 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 21:49:48,591 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,SelfDestructingSolverStorable13 [2022-01-10 21:49:48,592 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1583721482, now seen corresponding path program 1 times [2022-01-10 21:49:48,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:48,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011956448] [2022-01-10 21:49:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:48,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-01-10 21:49:48,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:48,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011956448] [2022-01-10 21:49:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011956448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:48,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382230451] [2022-01-10 21:49:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:48,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:48,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:48,801 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 21:49:48,803 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 21:49:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 9458 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 21:49:49,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:49:50,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:50,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382230451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:50,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:50,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-01-10 21:49:50,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407350388] [2022-01-10 21:49:50,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:50,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:49:50,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:50,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:49:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 21:49:50,859 INFO L87 Difference]: Start difference. First operand 97777 states and 111801 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 21:49:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:49:53,358 INFO L93 Difference]: Finished difference Result 362764 states and 415321 transitions. [2022-01-10 21:49:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:49:53,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 309 [2022-01-10 21:49:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:49:53,745 INFO L225 Difference]: With dead ends: 362764 [2022-01-10 21:49:53,746 INFO L226 Difference]: Without dead ends: 264989 [2022-01-10 21:49:53,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 21:49:53,786 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 806 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:49:53,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 403 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 21:49:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264989 states. [2022-01-10 21:49:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264989 to 264928. [2022-01-10 21:49:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264928 states, 264927 states have (on average 1.1446285203093682) internal successors, (303243), 264927 states have internal predecessors, (303243), 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 21:49:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264928 states to 264928 states and 303243 transitions. [2022-01-10 21:49:57,588 INFO L78 Accepts]: Start accepts. Automaton has 264928 states and 303243 transitions. Word has length 309 [2022-01-10 21:49:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:49:57,589 INFO L470 AbstractCegarLoop]: Abstraction has 264928 states and 303243 transitions. [2022-01-10 21:49:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 4 states have internal predecessors, (304), 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 21:49:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 264928 states and 303243 transitions. [2022-01-10 21:49:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-01-10 21:49:57,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:49:57,682 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:49:57,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 21:49:57,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:57,883 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:49:57,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:49:57,883 INFO L85 PathProgramCache]: Analyzing trace with hash 998622049, now seen corresponding path program 1 times [2022-01-10 21:49:57,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:49:57,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459745724] [2022-01-10 21:49:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:57,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:49:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 171 proven. 6 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-01-10 21:49:58,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:49:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459745724] [2022-01-10 21:49:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459745724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:49:58,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802320976] [2022-01-10 21:49:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:49:58,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:49:58,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:49:58,080 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 21:49:58,082 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 21:49:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:49:59,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 9362 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 21:49:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:49:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-10 21:49:59,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:49:59,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802320976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:49:59,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:49:59,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:49:59,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263911691] [2022-01-10 21:49:59,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:49:59,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:49:59,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:49:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:49:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:49:59,706 INFO L87 Difference]: Start difference. First operand 264928 states and 303243 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 21:50:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:02,128 INFO L93 Difference]: Finished difference Result 676412 states and 774855 transitions. [2022-01-10 21:50:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 310 [2022-01-10 21:50:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:03,135 INFO L225 Difference]: With dead ends: 676412 [2022-01-10 21:50:03,135 INFO L226 Difference]: Without dead ends: 411486 [2022-01-10 21:50:03,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 309 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 21:50:03,316 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 308 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:03,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 950 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 21:50:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411486 states.